Montgomery's position as the sprite elder grants him the responsibility of looking after the Spirit Crystals. Alongside this, he is also tasked with determining whether a person is of pure heart and is worthy of receiving a spirit crystal.
In Attack of the Saiyans chapter 13, "The Ultimate Technique! Power of the Spirit Bomb", Montgomery appears in front of Goku, Bubbles, and Gregory soon after Goku has defeated the soul of Raditz, who wanted a spirit crystal for the power it would supposedly grant. As a part of his training under King Kai, Goku receives a spirit crystal from Montgomery, after the sprite admits that they have no mystical purpose whatsoever. Instead, he says they are the mark of one who is of pure heart, and reveals to Goku that he has been capable of using the Spirit Bomb the whole time.
|Other World beings|
|Supreme Kais||Old Kai/Future Old Kai • Grand Supreme Kai • Northern Supreme Kai • Shin/Future Shin (Kibito Kai) • Western Supreme Kai • Southern Supreme Kai • Chronoa • Zen • Fen • Wairu • Gowasu • Future Zamasu/Goku Black|
|Kais||Grand Kai • North Kai/Future North Kai • East Kai • West Kai • South Kai • Zamasu|
|Ogres||King Yemma • Megaphone Ogre • Guide • Sweeper • Goz • Mez • Saike Demon|
|Other beings||Alien Announcer • Angels of Hell • Annin • Bubbles • Core People • Enma • Frankenstein • Ghosts • Gregory • Janemba/Future Janemba • Jiang Shi • Kibito/Future Kibito • Korin/Future Korin • Majon • Montgomery • Mr. Popo • Old Witch • Princess Snake • Princess Snake's Attendants • Shusugoro • Skeletons • Spike the Devil Man • Sprites • Sugoro • Trampire • Vampire • Zombies • Fused Zamasu/Infinite Zamasu|
|Other World Tournament||Arqua • Caterpy • Chapuchai • Froug • Gorilla • Maraikoh • Mijorin • Olibu • Other World Fighter • Papoi • Pikkon/Future Pikkon • Sarta • Tapkar • Torbie|