Monobeasts

The Monobeasts were minor characters introduced in Danganronpa 2: Goodbye Despair and were used by Monokuma during the Killing School Trip to prevent the Class 77-B from accessing the various islands connected by bridges to the central island.

They are a collection of 5 animal-themed giant robots used by Monokuma to keep the students in line, the Monobeasts first appeared from Jabberwock statue on the central island at Jabberwock Park under the authority of Monokuma, treating them as his own pets. When they are first introduced, Monokuma presents their power using Usami as an example by commanding them to attack her. After they're introduced they take up residence in front of the bridges on the central island, blocking the students from crossing them to the other islands until Usami begins destroying them one by one.

Quotes
“After a fierce battle that's never been seen in history, I've finally succeeded in conquering the last Monobeast” (Usami talking about Monobeasts) “With the Monobeast gone we crossed the fifth bridge and arrived at the final island” (Hajime Hinata talking about Monobeasts)

Trivia

 * During Side: Hope - The Academy of Hope and Students of Despair, the Class 77-B fought the Ultimate Elite Task Force and the two robot unit's allied with them that Nekomaru Nidai and Kazuichi Soda were fighting could be seen as a reference to the Monobeasts from the Neo World Program due to their similar appearance and mechanical strength.
 * Usami defeats each Monobeast one by one but despite this it is unknown how she defeats them and what happens to them after as her battles with them are done off-screen.