Metronome. That move can turn any battle in to total chaos unlike anything else.
I used to run a full metronome team in online battles for the laughs. Never won but it was more about the experience than anything.
I’m not sure if I have a favorite move. I love the one-hit knockouts, but I don’t use them very often because they always have a high chance of missing. I find Ice Punch very satisfying to use with my Croconaw. I typically don’t evolve my Croconaw because I prefer him to Feraligatr. I don’t battle competitively. I just casually play the games.
Earthquake, good for all occasions more or less lol.
Also Ice Beam cause it's more reliable than Blizzard, same for Flamethrower rather than Fire Blast. Seems they increased Thunder's accuracy or I've been lucky but ye.
hydro pump. vaporeon is one of my favorite pokemon, and mine always has that move. i just think it's neat, but i'm also not one of those strategic fighters, i'm a "damage dealing moves only and we die like men" fighter.
i loved gen 3 quick attack and gen 3 perish song. quick attack was just the back sprite wooshing around in a circle with a woosh sound effect. so simple and satisfying. and I loved how much gravity (?) the music notes in perish song had when they flipped and fell. i know quick attack is not the same anymore and don't recall how perish song changed.
I like many moves. but to be honest, I like thunderbolt, because I like Electric type and the accuracy is 100 percent. However, if the opponent's pokémon type is Ground, the attack does not affected the pokémon
I don't know why, but I always found the Gen 3 Thunder sound and animation to be incredibly satisfying. Ice beam in Gen 4 is also very satisfying for some reason.
(In all seriousness, very pretty move, very good for Manaphy. Imagine having a full team of Pokemon be crushed by a little blue baby who did 2x Tail Glow.)
Gen 2 Psychic sounds OP as all hell, and Hyper Beam because again, that sound effect makes me shiver with mirth every time. So happy they brought back the Psychic and Hyper Beam sound effects in all their glory in Gen 6. Gen 1 Bubble Beam sounds so good too~ I love the way Psybeam/Psywave/Aurora Beam sound as well.
Gen 1 Thunderbolt because it's flashy, Gen 2 Crunch because it looks painful, especially coming from a HOUNDOOM (check out that dex entry, getting burned by a Houndoom's flame will hurt forever so just imagine a bite) Gens 2 - 3 Flamethrower because it sways up and down, Gen 4 Petal Dance because it looks and sounds cool, Gen 5 Extreme Speed because that animation is so much fun, Gens 6 - 7 - 8 Play Rough because you know who else plays rough? The Prince of Sablé, specifically in Super Smash Bros. as an assist trophy. It's ADORABLE