Ash's Frogadier is the evolved form of
Ash's Froakie. It evolved during a battle with
Saizo's Barbaracle. As a result of evolving, it learned Aerial Ace.
Bonnie was disappointed that she didn't get to see it evolve and wanted it to turn back into a Froakie so she could see it evolve.
Sawyer's Grovyle is the evolved form of
Sawyer's Treecko. It evolved in a battle against
Ash's Frogadier where it also learned
Leaf Blade.
Despite evolving, learning a new move and becoming stronger, it couldn't overcome the EXP that
Ash's Frogadier had and was quickly knocked out with a blast from
Water Pulse.
Sawyer vowed to Juptile that they should become stronger.
Sawyer's Grovyle became
Ash's Frogadier rival after that battle as the two locked eyes in anticipation of their rematch battle.