Retro Gaming
Black and White Thinking
One other use for Dtilt I see is near the ledge. It does a wonderful job of hitting the area an opponent is in if they're holding onto the ledge, especially because Squirtle basically rotates forward an entire Squirtle length to attack, then returns back to his original position. As far as I remember it also causes stage spikes on Pokémon Stadium 1 pretty frequently.