Well, that's the only way at the moment beyond spawning him legit.
Guide:
Get Cheat Engine and the Cheat Table here:
https://www.mpgh.net/forum/658-border...ck-update.html
1. Start Borderlands 2
2. Open the Cheat Table (Make sure you hit Yes to enable Lua) when you get to the character select screen (Or even when you go in game)
3. Select a character and start the game.
4. Go to an area with Varkids (Caustic Caverns, ect)
5. Press INSERT once until you hear the beep. If you don't hear the beep, check the debug log.
6. Once done, hit the END button to change all Varkid evolutions to Vermi. The Varkids will have to create a cocoon and once they hatch, they will be Vermi.
7. Press PAUSE BREAK to return the spawns back to normal.