>>15666964I'd love to know myself too, but the Japanese pokemon fandom feels like a terra incognita/forbidden city most of the time.
If Pixiv is of any indication, there is some hunger for MeGallade strong enough to push some artists to draw their own vision of what that Mega could look like.
Then again, art searches are a tricky and unreliable medium of determining actual popularity. If deviantfART is of any indication, Galladefags on average feel less compelled to express their love for 'bro' through graphic means. Around both tARTletland and Pixiv Gallade has like 4/5 of attention that Blaziken gets, so it isn't like he is THAT average of a choice.
If only there was a way to get through to Japanese Galladefags...