Over 100 based on things I've seen IRL, but some of the most common would probably include the
Weedle line (stinging caterpillars and yellowjackets/wasps in general),
Pidgey (Carolina wren),
Ariados (various spiders),
Hoppip line (dandelions),
Murkrow (crows),
Beautifly (swallowtail butterflies),
Volbeat and
Illumise (fireflies),
Corphish (crayfish),
Starly and
Staravia (starlings),
Tympole line (toads and tadpoles),
Lilligant (orange daylilies),
Deerling line (white-tailed deer),
Joltik (ticks and jumping spiders),
Noibat or
Zubat (bats),
Skwovet (grey squirrels),
Blipbug line (lady beetles, including the seven-spot), and
Rolycoly (coal). We'd also have plenty of
Oddish if you count mayapples ("American mandrakes") as mandrakes.
A little less common, but we might also have
Caterpie (swallowtail caterpillars),
Ekans (various snakes, including ringnecks),
Nidoran (rabbits),
Venomoth (tiger moths),
Lickitung (lungless salamanders),
Nincada line (cicadas),
Trapinch line (antlions, mayflies, and sanddragons),
Swablu (bluebirds),
Burmy (bagworms),
Snivy/Servine (greensnakes),
Karrablast line (snail-eating ground beetles),
Mandibuzz (vultures),
Litten/other cats (stray cats),
Pikipek (woodpeckers),
Chewtle line (snapping turtles), and
Frosmoth (flannel and luna moths). And
Turtwig if you consider American box turtles close enough to Asian box turtles.
For my full list, you can check out my personal RealDex
here. (We'd also have the
Hoothoot line (owls),
Shinx line (bobcats are a type of lynx),
Drillbur line (moles), and
Nickit line (foxes), but I've yet to get photos of them!)