This Viper called Ariel is exclusively made with pieces from Designer set 4888. Vic Vipers are characterised by their rear lateral wings, dual forward prongs, and single dorsal tail.
This funny robot character is an alternate of Designer set 4888. This set has some great parts, but it’s tricky to come up with any good alternates. Luckily it contains a lot of hinges, so I was able to build some articulated droid, called Mr.Y, which fully spelled forms MisterY.