アニメ第117話で初登場。バルーンの形した妖怪いばる~んはいつも上から目線。とりつかれると、何でも威張って舞い上がってしまう。名前は「威張る」+「バルーン」からだそうです。
Iballoon is a member of the Brave Clan and makes its first appearance in episode 117 of the anime. Puffed up like a hot air balloon, this yokai likes to brag about everything. Anyone possessed by this yokai will look down on everyone else and boast about anything and everything. The name 「いばる~ん」 is a combination of 「威張る」‘ibaru’ which means to brag and「ばるーん」‘balloon’.
上から目線の いばる~ん 妖怪ウォッチ3アイロンビーズの図案