All but the electric wyvern emit chem trails into the atmosphere that control other players and dinos in the same manner that a regular player controls their player in game but on a government scale. This can only be countered by a player spraying vinegar into the air in the direction of the chem trail clouds. The electric wyvern is able to 1337 hax0r the game by modifying the circuitry of your computer.
The best way to level up a Giga on Rag is to get a bunch of wyverns to follow you on your griffin/ptera, then dismount you’re flyer above the Giga, then get on your Giga and absolutely destroy them. This got my Giga 26 levels from 3 wyverns.