There are 3 types of verse-jumping techniques in the movie

I don't know if anyone has explained about this already. but this is my understanding on the verse jumping techniques used in the movie.

1. Mind controlling: you can see Alpha Waymond in his alphaverse putting on the headgear of some sort in the van and controlling the mind of Waymond in Evelyn universe. This is like hijacking someone else's mind. The people who's got controlled won't have the memory of while being controlled 2. Temporary verse jumping: this can be achieved by doing random things while putting on an earpiece like what we saw the most in the movie. You can access the memory and skills of yourself in the alternate universe. People who did the mind controlling from number 1 can also make the verse jumping in another universe too. That's why Alpha Waymond mind controlled Evelyn's Waymond and then put on the earpiece to temporary verse jump in order to gain kung fu skill. 3. Verse Jumping at will: only 2 people can do this in the movie which are Jobu Tupaki and Evelyn. When you gain this power, your mind can hop to another universe anytime you want, also you can conjure anything, changing clothes, transforming a baton into a dildo. etc