Spiderman or Batman they're both so good.
Metal claw is not a crystal version move, false swipe is garbage for battles, teach him harden, swords dance, and keep slash, but quick attack has to go for another type move
Electric types are best for KOing Vaporeon. Pokemon with the move false swipe are best for lowering Vaporeons hp without KOing it.
Catch a Scyther. The best would be at the Bug Cathing Contest in Goldenrod City. It learns False Swipe at 18 level.
use master ball if you haven't yet. if you have used it the best way would to use a Pokemon with sleep powder or sing then use a Pokemon with false swipe to get its HP low then use Ultra balls
you can catch it by teaching a Pokemon False swipe. The first time you encounter it and you use a move, it will flee. next time you encounter it, paralyze it or put is to sleep. The moves charm and thunder wave work best. also sweet kiss. Than use false swipe and a quick ball.
Trasmorm False Swipe Metronome Hyper Beam
Put a Dark-type Pokémon with False Swipe (I recommend Absol) at the front of your party. Use False Swipe until Mewtwo is at 1 HP. Start throwing Dusk Balls.
It doesnt matter what ball you use. Have someone that knows hypnosis, mean look, and/or false swipe. If its at night, use a dusk ball. if not, use an ultra ball.
best ball is always a master ball but i would use a poke ball cause you meet at level 1 just teach faise swipe to a Pokemon use it and use a couple poke balls
only if you saved before and its pretty easy to as only lv 13 14 15 or 16
get apokemon that know false swipe to get its hp low or use a master ball
1. a lapras that knows the move lock-on & 3 ohko moves 2. garchomp that knows false swipe 3.dragonite 4.tyranitar 5.salemence 6.charizard but not in that order