Renuyu is a dangerous and addictive chemical developed by the laboratories of Roland Daggett.
Trivia
- Because of what it did to Matt Hagen, Renuyu is currently locked up in ToonTown's Restricted Items Storage.
- In "Twilight Sparkle & Friends"/"The Rainbooms" series, Grim is keeping Renuyu out of anyone's hands in his trunk.