Articuno, Moltres and Suicune will be weak on electric types. Charizard and Zapdos can be
defeated by rock/ground and Mewtwo is weak on dark. 3 pokemon on same level could defeat
it.

things why I say no
1.articuno is weak against fire/rock

2.moltres & charizard is weak against water/rock

3.zapdos is weak against rock

4.suicune is weak against gr***/electric

♥mewtwo can be the stongest pokemon if you teach it flametrower,icebeam,thunderbolt and
psychic♥

that's all thank you!

the biggest problem is that half your team is also part flying which makes them weak to
electric (something that every strong team has) i would suggest adding a tyranitar or
another strong rock type, and tyranitar can easily defeat psychic (another team essential)
with his dark type moves

noooooooooo!!!!!!!!!!!!!!!!!!