Currently this is what I've found. Been combing through other threads for where to find cards. Apparently there's either 74 or 75 cards available to get, but unsure at the moment. Also post other cool stuff you found.

Nutanuk card - your house on mom's table in new bark town
Cigerillar card - Elm's House on his table in new bark town
Radeon card - other neighbor house on their table in new bark town
Gwubby Card - South of Cherrygrove town inbetween some trees
Bugcatcher Card - in empty spot inbetween trees next to Mr. Pokemon's House
Ambinni Card - Blue hair girl in Pokémon School
Eukub Card - Sprout Tower on the lefthand side of the second room
Bobbite Card - Fight leftmost Fisherman to earn this
Todestone Card - Behind Kurt's House
Umberjack Card - inside woodcutter's house in the pile of wood (azalea town)
Tabacoon Card - Ilex forest at the end of hallway (right before exit)
Gambler Card - Talk to brown hat gambler in goldenrod next to poke center
Goosapling Card - Inside Trash Can in National Park next to lady with the cat
Hexahed Card - Check the Lower Left most slot machine.
Breeder Card - Check Trash Can inside John Day Care
Qwail Card - Show Qwail to the husband in Cherrygrove debating which is better "Qwallop or Wormacho"
Hivemaim Card - Check right side of pink tree on Route 37
Motho Card - Inside Ecrutek Pokemon Center in front of the PC
Buzzling Card - Check Lawnnie Fountain in Azalea Gym