I have Charizard, Venusar and Blastoise in Emerald. They are L:50. Are they going to be good in Batle Frontie

Question

Blastoise, Charizard and Venusar. Tell me very good attacks for them and which Pokemon to start first in Battle Dome and Battle Pike in Battle Frontier. I also have Sceptile, Blaziken and Swampert. Tell me which attack for them at L:50 and I go to Dome and Pike. Shall I use Shedinja? Tell me, please.

Answer 1

start with blastoise - best defenses and also benefits from not having dual weakness (or worse, double weaknesses, like rock for charizard)

having all the starters doesn't actually make a good trio, weird as that sounds

never use a shedinja - battle areas like that are set up with a wide variety of moves, and shedinja is weak against a LOT of move. every single pokemon will have something that can hurt him, pretty much.