This mighty behemoth went up against Ash's Squirtle and nearly had it on the ropes until Ash had Squirtle use Hydro Pump and ultimately weakened it, making it easier to defeat and earn Ash his second win.
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|+ indicates this Pokémon used this move recently.*|
- indicates this Pokémon normally can't use this move.
- In the dub Drake made a pun about Onix saying it'll "rock" Ash.