If you want any of them to have Trump Card... You keep leveling Eevee.

Yeah, but it always hits and can have up to 190 base power.

Almost always hits. Sand Attack/DT/Fly/Dive/Dig/Shadow Force

As in, it works like swift/aura sphere/shadow punch. It always hits unless someone uses dig, fly, or something similar. It can't miss based on accuracy or evasiveness.

I recall it being like Dragon Claw or Thunderbolt or most other moves: 100% accuracy, unless evasiveness or accuracy increases/decrease

Nope. It hits always.

If you want Bite though, get Eevee up a few levels

Evolve them first, then level them up. Otherwise, you'll miss out on some of the evolved form's moves

thats what i was plannin but i didnt know. thanks

Do you want any to know Bite though?