I din't see any in the catalogue, so here we are.

I'm trying the Super Single Battles, and managed to reach somewhat easily the 30th one, when fucking Wally rekt me with M Gallade.
My team is this one (sorry I don't remember the natures and evs, but the sets are pretty self explanaroty):

Alakazam @Life Orb
-psyshock
-shadow ball
-dazzling glam
-energy ball

Bewear @assault vest
-hammer arm
-return
-ice punch
-shadow claw

Charizard @charizardite Y
-heat wave
-air slash
-ancient power
-solar beam

Alakazam is the lead and honestly she (yes, she) steamrolls a good 70% of enemy teams on her own, and usually what doesn't get killed is taken down from the teammates. I din't meet any recuttent big threat to the team, and usually past the second time I met a pokemon I found a way for the team to deal with anything. Only problem, that fucking M Gallade survived the shadow ball, one shotted alakazam and sweeped me with its speed and coverage.
Any tips on how to improve the team? Should I change mega? ATM, besides the kanto starters, I can mega evolve gengar, alakazam and salamence.