Rivals are a core part of the Pokémon franchise, both creating a challenge for players in the Pokémon video games, as well as for Ash in the Pokémon animated series. As the anime often loosely follows the storyline and structure of each new video game title by keeping the new region, gym leaders, and key opponents, many of Ash’s rivals come directly from the games. Having already traveled over eight regions, Ash has met many challengers–yet some stand out significantly over others for their strength, friendliness, or wisdom.

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To be considered a rival, the character needs to show up on several occasions within the anime, and compete directly with Ash, either with Pokémon battles or as competitors in the same tournament. Ash often battles his rivals when they encounter one another, but some of the friendlier rivals will have other roles to play, occasionally joining forces for things like fighting Team Rocket. Most importantly, though, is that Ash treats them as a rival, someone aiming for the same goal as him.

15 Tierno

Pokemon's Tierno, a rival of Ash.

Tierno is a rival character who comes from the X and Y video games, and consequently appears in the XY anime as well. Tierno is a bit of an unusual rival, as his real goal is to form a Pokémon dance team, something that Ash has no interest in doing. Still, Tierno and Ash battle on multiple occasions, and Tierno is on the gym circuit, collecting badges just like Ash. Tierno made it all the way to the Lumiose Conference tournament but ultimately lost to another of Ash’s rivals, Sawyer. Tierno never fared too well in battle against Ash, so it’s probably for the best that he lost to Sawyer.

14 Morrison

Ash and Morrison from the Pokémon anime

Morrison is a trainer from the Hoenn region who appeared throughout the Ruby and Sapphire era of the Pokémon anime. Morrison is a strong trainer who did a decent job participating in the Hoenn League. Unfortunately for Morrison, despite winning his matches in the first three rounds of the league, he had no real standout qualities through his battle and training style, nor his Pokémon team. While he has Pokémon that are usually considered powerful fighters, such as Swampert and Steelix, Morrison never stands out as a real threat and is ultimately rather forgettable.

13 Hau

Pokemon: Ash and Hau

Hau is another rival character straight from the games, this time Sun and Moon. A native of the Alola region, Hau is a relaxed and laid-back character, but he can certainly be serious when he needs to be. Ash actually lost his first battle against Hau and only won the second due to using a Z-move, making Hau a more threatening rival than he initially appears. Hau comes back for the Alola league tournament, where he made it to the top 16 in the pre-tournament battle royale, but eventually lost to Ash in the actual tournament, hurtting his confidence. Still, Hau stayed and watched Ash’s ultimate victory, which hopefully gave him a little solace.

12 Raihan

Pokemon: Ash and Raihan

Raihan is a Dragon-type gym leader from the Galar region and another contestant in the World Coronation Series. While Raihan sees himself primarily as Leon’s rival, Ash’s desire to be the one to defeat Leon put them at odds with each other. Ash’s first competition with Raihan was, oddly enough, a baking competition, which Ash surprisingly won. Raihan was Ash’s final opponent before being eligible for the World Coronation Series’ final tournament, the Masters Eight, and proved a difficult obstacle to overcome. Ash’s ultimate defeat of Raihan proved to him that he belonged in the tournament, and Raihan stayed to watch Ash’s eventual match with Leon.

11 Barry

Barry cheering in the Pokémon anime

Barry is a trainer from the Sinnoh region and is a rival of Ash through the Diamond and Pearl era of the Pokémon anime, and the rival to the player character in the Pokémon Daimond, Pearl and Platinum video games as well as their remakes, Brilliant Diamond and Shining Pearl. Though Barry is known for having one of the toughest final battles in the Pokémon video games, he lost to Ash in almost every battle against him throughout the anime, and lost terribly to Paul. Barry has a strong team, but Barry’s time on screen does very little to showcase this and leaves some fans feeling like he didn’t quite live up to the expectations that his in-game counterpart set.

10 Kiawe

Kiawe and Ash facing off against each other in Pokemon

Kiawe is a trainer of the Alola region, and an extremely strong side-rival and friend to Ash throughout the Sun and Moon Pokémon anime era. Kiawe and Ash have a friendly rivalry that always leads them to battle each other, resulting in them both becoming stronger. Kiawe and Ash turned many situations into competitions and were always ready for a sparring match with their Pokémon, but they were great friends along the way. Kiawe was a strong trainer who made it all the way to the semi-finals of the Alola League, only missing out in a battle against Ash in the final due to a loss against Gladion.

9 Trip

Trip and Ash from the Pokémon anime in a battle against eachother

Trip is a confident trainer from the Unova region who plays the role of rival to Ash throughout the Pokémon: Black and White anime era. Trip is a cocky trainer, having defeated Ash in every battle prior to the Unova League, and was the winner of the Pokémon World Tournament Junior Cup. Trip may have proved his strength over Ash with the evidence of their win-loss record, but fans could not bring themselves to enjoy his character. Many viewers felt he was somewhat a carbon copy of rival Paul from the generation prior, keeping the annoying personality and cocky persona without all the other key elements and character arc that make Paul so interesting.

8 Bea

Pokemon: Bea vs. Ash

Bea is a gym leader from the Galar region who entered the World Coronation Series, aiming to be the best. Ash goes up against Bea rather early in the World Coronation Series and loses to her, prompting him to realize he was battling at a different level than he’d ever experienced before. Ash’s loss to Bea motivates him and sets her up as a secondary rival, with their next battle ending in a surprising draw. Ash finally defeated Bea and won her respect in a match spectated by Leon, opening the way for him to enter the upper tiers of the World Coronation Series.

7 Sawyer

Sawyer and Ash from the Pokémon anime

Sawyer is a Pokémon trainer from the Kalos region who befriends Ash and begins a friendly rivalry with him throughout the Pokémon: XY anime era. Sawyer was a trainer who started relatively weak but worked extremely hard by taking notes and lessons from other trainers, including Ash. Watching Sawyer study intensely and grow in strength throughout the story was a pleasant development that the audience enjoyed, with him becoming a talented strategist. After much hard work, Sawyer developed and honed his skills to a point where he was capable of defeating Ash. Many fans adored watching his hard work pay off when this occurred, making Sawyer a perfect representation of a well-written friendly rival.

6 Ritchie

Ash and Ritchie with their Pikachu in Pokemon

Ritchie is a friendly rival to Ash throughout both the original Pokémon anime taking place in the Kanto region, and throughout the Johto region era. Ritchie is known for nicknaming all his Pokémon, with his most significant being his partner Pikachu, named Sparky. Ritchie is a Pokémon trainer that many fans wish had been given more screen time, as he was a very interesting rival to Ash due to their similar Pokémon. Ritchie was a strong trainer who had a close bond to his Pokémon, and he mirrored many aspects of Ash’s personality and training style. Richie was also capable enough to make it into the top 8 of the Kanto League, proving his skill as a trainer and challenger to Ash.

5 Gladion

Gladion and Ash shaking hands in Pokemon

Gladion is a trainer and competitor to Ash during his adventures in the Alola Region throughout the Pokémon Sun and Moon anime era. Known for battling with his signature Pokémon, Silvally, Gladion did a much better job at being a rival to Ash than many characters from previous generations. Gladion is a talented Pokémon trainer who defeated Ash many times during their adventures. The two grew in strength throughout the story, and their last battle in the Final of the Alola Pokémon League is now considered one of the greatest Pokémon battles throughout the entire anime.

4 Leon

Pokemon's Leon

Leon is the undefeated champion of the Galar region, both in the Sword and Shield games and the anime. Ash immediately set his sights on defeating Leon as soon as he learned about him. Ash ended up helping Leon to deal with the disaster caused by Eternatus, allowing him to impress the champion with his abilities. Ash entered the World Coronation Series specifically to get a battle with Leon, and he eventually did–in the final round of the tournament, no less. Leon is an unconventional battler, much like Ash, and even adapted one of Ash’s original moves to use against him, making him a top-tier rival that Ash truly had to struggle to defeat.

3 Gary Oak

Gary and Ash from the Pokémon anime

Gary Oak is the first rival Ash ever has, with their competitive relationship starting from the beginning of their journeys in the Kanto region. He is known for using his Blastoise in battle, often opposing Ash’s Charizard to use type advantage, as Blastoise is known as one of the strongest water type Pokémon. Gary is confident, cocky, and often enjoys mocking Ash and rubbing his achievements in his face. However, as Professor Oak’s grandson and an exceptionally skilled trainer, Gary gave Ash some of the best Pokémon battles throughout the entire franchise. The two even ended up understanding each other and becoming friends during the Johto era, making their rivalry one of the best-written stories in the Pokémon anime.

2 Alain

Ash and Alain from the Pokémon anime

Alain is a powerful Pokémon trainer from the Kalos region and a friendly rival to Ash throughout the Pokémon: XY anime era. Alain’s undeniable strength was only maximized with his Charizard, who was capable of Mega Evolution, and they are known as one of the most significant trainer and partner Pokémon duos in the franchise. Alain never lost a single match to Ash throughout their time as rivals, even when Ash opted to use Greninja, his most powerful Pokémon. After honoring a promise to Ash and joining the Kalos League so that they could battle again, he won the entire tournament and became Kalos League Champion – only proving how strong he was.

1 Paul

Paul and Ash stare at each other while in battle in Pokemon

Paul is a trainer from the Sinnoh region and is the most significant rival to Ash throughout the Diamond and Pearl era of the Pokémon anime. Paul is known for being an extremely tough trainer and the polar opposite of Ash, as he has a terrible attitude and prioritizes the training and brute strength of his Pokémon over friendship and bond.

However, Paul is extremely driven to become a powerful trainer, managed to either defeat or tie with Ash in every one of their battles prior to the Sinnoh League, and stood out as the most intense rival Ash had ever faced. Ash’s rivalry with Paul was only ignited further when Paul abandoned his Chimchar for being too weak, with Ash befriending it and adding it to his team. This was a key moment of the story, and their League battle was one of the best in the franchise, with both Ash and his now evolved Infernape aiming for revenge against Paul in battle. Despite their heated rivalry, Ash and Paul were also able to learn from and respect each other by the end of the Sinnoh journey, making their rivalry an absolute standout among others.

Ash’s rivals helped to keep the show interesting by giving him other trainers to be measured up against. Sometimes he’d win, and sometimes he’d lose, but Ash’s rivalries often made for some of the anime’s most compelling relationships. With Ash so focused on his dream, it was good for the series to occasionally provide alternate perspectives on what it means to be a Pokémon Trainer, which also helped to illustrate what it meant to Ash. After all, Ash wouldn’t be the Pokémon hero he is today without these rivals to spur him onward!

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