This topic has some examples of possible future upgrade cards.
Cards found so far:
WALKING SPEED
Walk Speed I
Walk Speed II
Walk Speed III
Walk Speed IV
JUMP HEIGHT
High Jumper I
High Jumper II
High Jumper III
TRIPLE JUMP HEIGHT
Baby Triple Jump
Medium Triple Jump
Big 'Un Triple Jump
MAP
Mappery
CAMERA
Camera Mode
CAMERA ZOOM
Zoomability
SKILLS
Skill Learning Brain
OTHER
Encyclopeddling
I will update this list as more are found.
Here are the profiles of testers found so far:
TESTERS
T. Testravoyavitch