Dromba

Drombas are the Dream World version of Grombas that appear in Mario & Luigi: Dream Team. Their name comes from a combination of the words "dream" and "Gromba". Drombas appear in clusters, and attack by forming an L-shape formation and then rolling towards Mario, which must be jumped over. If there aren't many remaining Drombas, they will instead roll towards Mario one by one, which is dodged by jumping over them.

Trivia

 * In a European pre-release version of the game, Drombas were called Schlumbas.