Master RJ, the Purple Wolf Ranger, is the only Power Ranger to have used the martial arts style of Muay Thai. He is also 1 of 2 Wolf Rangers in the entire franchise the first being Merrick Baliton from Power Rangers Wild Force.
This was the final series to be produced under Bruce Kalish. Though Disney considered pulling the plug on the franchise with his departure, Bandai successfully lobbied for another season due to contractual obligations.
The first season since Power Rangers Turbo (1997) to not give any ranger a battlizer. Instead, the budget went into creating three rangers who appeared in the toyline, but never Gekiranger: The Elephant, Bat, and Shark Spirit Rangers.
The Rinshi Warriors that became the Five Poison Fingers were inspired by the Shaw Brothers movie The Five Deadly Venoms. The characters consisted of the snake, scorpion, centipede, toad and lizard all part of The Poison Clan in the Shaw Brothers movie. A nice homage to the 70's Kung Fu flicks.
This was the only series to feature Rangers who have no interaction with both their predecessors and their successors in any form, until the Power Rangers Super Megaforce episode Spirit of the Tiger featured Casey.
This season is the second in the franchise in which original American Rangers are created and brought to the screen. The 3 Spirit Rangers are those Rangers this season. The first time this happened was in Power Rangers Lightspeed Rescue with the Titanium Ranger.
During production of Jungle Fury, the actors who played RJ, Casey, and Lily also appeared in the first season of the show "Legend of the Seeker". David De Lautour played recurring character Michael Cypher, while Jason Smith and Anna Hutchison made a guest appearance in the episode "Identity"