The Production Release Order is as follows (these are the Japanese Air Dates):
Digimon Adventure - March 7, 1999 to March 26, 2000 [Series]
Digimon Adventure Movie (Part one of Digimon: The Movie) - March 6, 19991 [Movie]
Digimon Adventure: Our War Game (Part two of Digimon: The Movie) - March 4, 20001 [Movie]
Digimon Adventure 02 - April 2, 2000, and ...
Renamon is based on / heavily influenced by the Japanese kitsune, which have mystical abilities, most famously that of illusions. On top of that, Renamon has ninja-like speed, and I'd say it's a combination of both that it's using here.
Blink an eye and you'll miss it. One moment it's there, the next it's gone and only leaves a fading stand-in illusion of ...