Heliolisk was later used in a battle against a crazy scientist named Belmondo and his robotic creation, Dark Clembot. Heliolisk fought against Belmondo's Magneton, but the battle was interrupted when Team Rocket showed up and tried to capture both Clembot and Black Clembot. After Blaziken Mask sent Team Rocket blasting off with his Mega Blaziken, Clemont recalled Heliolisk to its Poké Ball.
Heliolisk was used as the second Pokémon Clemont chose in a gym battle against Ash. In the battle, Heliolisk fought against Ash's Goodra. Despite Goodra's enormous size and power, Heliolisk weaken Goodra with its speed, using Flash to blind Goodra and Thunder Wave to paralyze it. This causes Ash to recall Goodra and sent out his Hawlucha. Heliolisk managed to weaken Hawlucha with its Parabolic Charge ability, but despite this, Hawlucha successfully defeated Heliolisk with a direct hit from behind with High Jump Kick, giving Ash the second win against Clemont.
When Team Flare began their assault on Lumiose City, Clembot sent Heliolisk out to defend its trainer and his friends from the roots that are infesting the city. It was later used to help defeat Aliana's Druddigon and Bryony's Liepard so Clemont can retake his gym. In the process, it managed to subdue some of Team Flare's scientists.
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Heliolisk was later used as Clembot's third and final Pokémon in a gym battle against Alvin. During the battle, it went up against Cubone and dealt some damage to it. However, Heliolisk was eventually defeated and Alvin won the match.
|Thunderbolt||Clemont's Got a Secret!|
|Dragon Tail +||Clemont's Got a Secret!|
|Bulldoze||Clemont's Got a Secret!|
|Parabolic Charge||Clemont's Got a Secret!|
|Flash +||The Moment of Lumiose Truth!|
|Thunder Wave||The Moment of Lumiose Truth!|
|Focus Blast +||Battling with a Clean Slate!|
|+ indicates this Pokémon used this move recently.*|
- indicates this Pokémon normally can't use this move.
- Kiyotaka Furushima (Japanese)