Earth Day Stitch is an Enchanted Lilo & Stitch figure. He can be unlocked during Lilo & Stitch Weekend Challenge or from the ticket machine for 45 tickets.
Behavior During Gameplay
It is night time and he will light up candles.
He was also given out for free at one point probably as compensation for a glitch, or as a glitch along with Hawaiian shirt Jumba. Both were given with only the tagline restored.