Quote Originally Posted by Pokemon Fan
Eh? The way I remember it, in the Clair episode Pikachu used that tackle-type Thunder for the first time, running on top of the Gyarados's Hydro Pump (not its back), while charging the Thunder, then releasing the Thunder as it slammed into Gyarados's body.
Oh yeah, he did run up the hydro pump! Anyway, pikachu ran up Milotic, which is another reason why the new series/games/pokemon/etc are like old ones.