With that in mind, Craterhoof Behemoth is a great choice, as you'll get an even bigger buff thanks to Volo when two of them enter at once
Like most Pokmon cards, the value of Pidgey depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (FireRed & LeafGreen)
After you have a selection, examine them yourself for scratches and tears using your eyes and a magnifying glass or lupe
Itll trigger all manner of payoffs, and while the activated ability is expensive and probably wont be used that often, it might come in clutch from time to time
Utter Insignificance overwrites all previous effects that set the creature's base power and toughness to specific values
Kangee, Aerie Keeper, Tawnos, the Toymaker, and Radagast, Wizard of Wilds are also some ways to take advantage of birds