Goldberg

Goldberg (ゴールドバーグ) is the Guardian Ghost of Mr. Little Lake.

About
This spirit liked to loudly claim that it was the incarnation of Xolotl, an Aztec god, but obviously, it was a mere nature class spirit.

O.S. Goldberg
O.S. Goldberg
 * Shaman: Mr. Little Lake
 * O.S. Type: Spirit Type
 * Spirit Ally: Goldberg
 * Medium Used: Utility knife

Anime/Manga Difference
Goldberg only appears as an aura around Little Lake's medium in the manga, and does not appear at all in either the 2001 or 2021 anime series.

In the 2001 anime, Mr. Little Lake instead has Jump, a plesiosaur spirit.