Things that happened, more at 11.
You need to stop making claims if you can't even bother to watch the very things you're arguing.
Do you not realize Groudon was in the middle of doing something? Was blindsided, taken by surprise and every other qualifier for why the fact you even thought of bringing that was somehow a good idea being the exact opposite. Honestly, the fact Groudon was more preoccupied trying to get the energy than dealing with Zard should tell you he wasn't that big a threat to them, wasn't even a priority.
"didn't ko him. but it one shot him".
Did you actually just contradict yourself that hard in the exact same line of text? If Megazard got put on his ass by Fug, that isn't an indication of scaling at all, to anything, in fact it's more proof he doesn't scale to legends.
And no, it doesn't work that way, just because it one shot them two doesn't mean they're equal, it just means MegaRay is insanely powerful and can one shot things far, far, beyond Zard X as well (Doubly so given how Zard X stacked up against them, which is to say very badly).
Anyway no, you're being disingenuous.
You say Megazard X "overpowered" Groudon, but failed to mention the fact
Groudon was completely unscathed, unharmed, and immediately turned around and one shot Megazard X.
Not only that
here's the Megagross and Megazard X attacking Primal Groudon at the same time and doing quite literally no damage to it despite their best efforts.
Every single attack that landed on Groudon from Megazard failed to even harm it. The worst part is, Steven's Megagross is actually quite a bit above megazard X at this point, and it can't even hurt them either, and it also got floored by Kyogre, so super effective or not isnt a factor. Mega Ray> Primals > Megagross > Megazard.
Sceptile's anti feat is getting its ass kicked by Greninja and having zero feats to begin with, and Greninja's anti feat is getting its ass kicked by Blast Burn.
Who got its ass kicked by Groudon and couldn't even damage it.
The
only thing Megazard has going for it, is that it actually did react to Groudon's attacks and managed to slice through a rock, so that's an objective claim. Unfortunately that doesn't change the fact it got one shot by Groudon and completely and utterly lacks the capability to even tickle Groudon.