Charge moves have two drawbacks:
1. You’re (at most) attacking once every two turns. The rotation is – Toucannon charges- Enemy A attacks – (after attack animation) Enemy B queues next move – Toucannon releases Beak Blast – Toucannon queues next move. Avalugg can mitigate this by doubling the power of his attack, but he still suffers from the second drawback which is:
2. You’re delaying your sync. Only the charging turn is counted towards the countdown and the attack turn doesn’t count. If you don’t have a propulsion user on your team, then using charge attack means you’d delay your sync by at least one turn. Remember every sync gives you an extra 0.5 damage multiplier. and therefore using too many charge moves in a long fight could hinder your whole team’s performance. This can be fixed by Propulsion 9 which I really wish Kahili could get with her sync grid.
source
Pokemon