Cloth doll (Normal) -> Voodoo doll (Normal/Ghost)
Lemur (Normal) -> Lemur 2.0 (Normal)
Dolphin (Water) -> Horned Orca (Water/Fighting)
OR Narwhal (Water/Electric)
Koala (Normal/Grass) -> Drop Bear (Normal/Grass)
Coconut Crab (Grass)
Greyhound/Black Shuck (Ghost) -> Bigger one (Ghost)
Three-stage Inca/Aztec mon (Ghost/Rock)
A tiny ghost which looks like it's hanging from rock boxing gloves. It evolves into a slightly larger ghost which is floating above two giant rock fists with an Aztec or Inca or whatever feel to them, little wisps of ghostiness connecting the two.
Possibly a third form which is a big floating Aztec archetecure thing with big arms and a serpent's tail, all connected by ghostiness.
Gargoyle (Flying/Rock)
Fossil mons based on
Opabinia and
Hallucigenia sparsa (both Rock/Water)
Golden Tortoise Beetle (Bug/Steel)
Centipede (Bug)
Kangaroo (Normal/Fighting)
Three-stage Troubador mons (Fighting x2 -> Fighting/Ground)
Three stager. Starts out mono Fighting. Looks like a humanoid fighting pokemon, lots of blues and yellows in color scheme. Has a crest on head that looks like a large duelist hat with a big ol' feather.
Second stage looks like a stronger/bigger version, but slightly fatter. Stomach resembles a drum. Third stage is Fighting/Ground. Very big, drum on stomach, horns on back. Like, musical horns. Not horns horns.
Alien mon (Poison -> Poison/Steel)
It's an extraterrestrial pokemon. Two stage, starts as poison, a lime green blob with one eyeball and nothing else. When it evolves the lower half of its body turns metallic and looks like a stereotypical UFO. Second stage ability is always levitate.
Tsuchinoko (Ground)