Arcbeetle is a KBT-type Medarot that first appeared in Medarot R video game of the Playstation console. It's design was based on a hercules beetle. Papercraft by StormL.
Medabots - Arcbeetle Papercraft

Sumilidon papercraft from Natsume's role-playing video game franchise Medabots (aka Medarot). Model by StormL and build photo by marlous2064.
Medabots Papercraft Sumilidon

The Gun-Nose whose design was based on a rhinoceros beetle is a KBT-type Medarot who first appears in the Medarot DS manga and as part of Medarot DS.
Medabot Papercraft: Gun-Nose