Im looking super size Pumpkaboo in friend safari and found nothing lolz .I think Pumpkaboo size is locked o_O. That is suck .I really need super size pumpkaboo with Hidden ability (insomnia ) lolz.

Unfortunately it is locked as the average size and there is no way to obtain an Insomnia Pumpkaboo in any other size, (there are no Pumpkaboo hordes in-game). People seem to be settling for Frisk Super Size Pumpkaboo competitively, (for the item warning advantage), so it is not all bad.

Ohh...
Frisk ability better than pickup anyway
.it seem I have to forget about it lolz .