The Hero meets Holt at the Trial Dig Site, where Holt challenges him to a practice battle with two vivosaurs. Soon after, they run into each other at Greenhorn Plains, and Holt teaches the Hero about Dig Site obstacles.
After some time passes, the player encounters him again, this time as McJunker's apprentice. He is fought at the Junk Depot and again during the the preliminary battle for the Hero's third Level-Up Battle.
Once the main story has been completed, the Hero can battle Holt in the innermost room of the crashed starship on the Secret Island.
In the Fossil Fighters manga
In the official manga posted on the North American Fossil Fighters website, Holt is one of the main characters, accompanying Hunter and Rosie throughout the story. It is implied that Rosie may have some romantic feelings towards him. He claims to have a total of 101 V-Raptor, but is only seen using four of them: Odin, Thor, Steve, and an unnamed one.
Trial Dig Site - Vivosaur Island: Holt challenges the Hero to his first battle since becoming a Fighter.
Junk Depot - Vivosaur Island: The Hero must defeat Holt in a battle to obtain the Electrominite needed to power McJunker's broken mine car. V-Raptor must be used in this battle to prove that the Hero can be trusted with the Electrominite - according to Holt, V-Raptors hate liars.
Fossil Stadium - Vivosaur Island: The Hero battles Holt in the preliminary round of the Level 3 Level-Up Battle.
Secret Island: Postgame, Holt can be found exploring the crashed starship now that the Secret Island has been opened to the public. Since they've got the time, he asks the Hero for a quick battle.
- In the official manga, Holt is a big fan of V-Raptor, even possessing photographs in a portfolio and a box of "collectibles."
- While Fossil Fighters would not allow the player to own more than one of a certain vivosaur, the number of V-Raptor he claims to have (101) happens to correspond to the addition of the Bank system in Fossil Fighters: Champions. Within the bank, a Fighter may have 100 extra vivosaurs of any kind, and including the one that may exist in the holder, it is possible to have a maximum of 101 of the same vivosaur.
- In the official manga, Holt's V-Raptor is seen using Cyclonic Breath, a skill it cannot use in the games. 
- ↑ Now defunct