Piggy bank / mini papercraft versions of the monsters based on the Phantasy Star video game series. Pictured above, from left to right we've got: Koltova, ???, Kakwane, and Pannon.
This is a continuation of the PSU papercraft series from nora_factory. The site is in Japanese so I've provided a little pic guide below that will help you know which download link corresponds to what character.
Phantasy Star - Monster Piggy Bank Papercrafts [Download]
Phantasy Star - Rappy Suit Papercraft [Related Posts]