See, for stall teams, TFL has informed me (and it is mainly true) that Gard has exactly two counters viable for us to consider. Or that stall regularly considers at all. That being Scizor-mega (Scizor is check, not all great on stall anyways) and Aegislash. Between Focus Blast/HyperVoice/Psyshock/Taunt (which, unsurprisingly, taunt is used a lot right now), Gard has all kinds of weapons to stall break. I think Mega Aggro can take a hit if you invest Spdef on him...
252 SpA Mega Gardevoir Focus Blast vs. 252 HP / 252 SpD Filter Mega Aggron: 213-252 (61.9 - 73.2%) -- guaranteed 2HKO
And OHKO with steel move. However, that's also a disabled mega and probably a dead poke for a kill. I've watched Reverb and another ladder player, Lil Manaphy, (both players being 1900+ and top 10 on the ladder) use Gard-mega for a while and it doesn't seem to need much support to destroy opposing teams. To be honest, Mega Gard almost reminds me of a non-rock weak ZardY. It hits incredibly hard on the main stab, has a mandatory support move (but gard's is stab so wins that one) and kinda needs focus blast to finish off the coverage. However, the difference is Gard can indeed take stall by itself.
252 SpA Mega Gardevoir Focus Blast vs. 252 HP / 252 SpD Filter Mega Aggron: 213-252 (61.9 - 73.2%) -- guaranteed 2HKO
And OHKO with steel move. However, that's also a disabled mega and probably a dead poke for a kill. I've watched Reverb and another ladder player, Lil Manaphy, (both players being 1900+ and top 10 on the ladder) use Gard-mega for a while and it doesn't seem to need much support to destroy opposing teams. To be honest, Mega Gard almost reminds me of a non-rock weak ZardY. It hits incredibly hard on the main stab, has a mandatory support move (but gard's is stab so wins that one) and kinda needs focus blast to finish off the coverage. However, the difference is Gard can indeed take stall by itself.