|Function||designed to reduce people and weapons to its pristine state.|
|Location||creating a park for animals extinct Mesozoic.|
Retro (Experiment 210) is a dinosaur-like alien and is Stitch's cousin. He is designed to turn anything into past versions of themselves by wrapping them with his tongue. He sneaks into the zoo and turns an elephant into a Woolly Mammoth, a tiger into a Saber-Toothed Tiger, and a squirrel into a Saber Toothed-Squirrel.
His one true place is in a park zoo. He accidentaly turned a lizard into a Tyrannosaurus Rex and the T-Rex goes on a rampage. Somehow he was with Hamsterviel in prison in "Woops" suggesting that Gantu caught him off-screen and he escaped and returned to the zoo before "Snafu".
Turns anything into something that was from the past by wrapping them with his tongue.
- Stitch and Lilo
- Woolly Mammoth/elephant
- Saber-Toothed Squirrel/squirrel
- Saber-Toothed Tiger/tiger
- T-Rex/unknown animal
Things Retro turned in from the past
- Clothes - turns them into medieval clothes
- Cell phone - turns it into the 1st phone
- Car - turns it into the 1st autombile
- Yacht - turns into into a prehistoric boat made by cro-magnons
- Elephant - turns it into a Woolly Mammoth
- Tiger - turns it into a Saber-Toothed Tiger
- Squirrel - turns it into a Saber-Toothed Squirrel
- Unknown animal (possibly reptile or bird) - somehow turns it into a Tyrannosaurus Rex without it being shown