Minjo

"Rarrrr! I'm a Minjo, arch enemy of the Jinjos!"

- Minjo

Minjos are small creatures that resemble and are the arch-enemies of the Jinjos.

Banjo-Tooie
Minjos appear as enemies in Banjo-Tooie, first appearing in Witchyworld. They appear in every world thereafter, including later parts of the Isle o' Hags and Cauldron Keep. In this game, Minjos imitate Jinjos, facing Banjo or Kazooie, waving their arms, and calling for help. Once they're close, however, the Minjo will reveal itself as an enemy, chasing them while growling, emitting sparks, and damaging the heroes on contact. Minjos are small, somewhat fast, and completely immune to the Forward Roll, making them somewhat tricky to deal with, but they are also fairly weak, being defeated in one hit from most other attacks.

Minjos in Banjo-Tooie look identical to Jinjos, but their disguise isn't perfect. Eggs will pass right through Jinjos, but damage Minjos, making it safe to check all potential Minjos by simply shooting them from a distance. The color they appear as is also picked randomly, and they may appear as a color of Jinjo that the player has already found all of. Lastly, Jinjos are often found in special alcoves or can only be reached by completing a certain puzzle, while Minjos are always found out in the open.

Banjo-Kazooie: Nuts & Bolts
In Banjo-Kazooie: Nuts and Bolts, Minjos can be found throughout Showdown Town. They are incapable of harming Banjo, and can be carried by Kazooie with Mumbo's Wrench after being hit with it.

Once a Jinjo is released from prison, a Minjo can be taken to their cells and replace them. When this is done, Pikelet congratulates Banjo on his work and reward him with some Musical Notes. There are six Minjos total, one for every imprisoned Jinjo.

Minjos in Banjo-Kazooie: Nuts & Bolts no longer look identical to Jinjos, having sharp, jagged teeth, red eyes, and grayish purple skin. They wear handcuffs and tattered prison clothes, signifying them as the true criminals. They can be difficult to spot because they're so small, but they also cackle at irregular intervals, giving away their presence.

Trivia

 * Minjos in Banjo-Kazooie: Nuts & Bolts were originally planned to be green, as seen in some promotional screenshots and concept art. The change from green to dark blue seems to have been made late in development, as their icon and the achievement "Vigilante" still show them with the incorrect color.