>>31023992Beating 7 Bewears gives you more Exp than beating an E4 member, and takes less time because there's no cutscenes, or moving from one room to the other, and it can be confortably done with a ghost-type, since the only Bewear can do back is Pain Split.
It takes a little longer to get started, since you have to find a Bewear and set up the SOS chain, and you'll probably want to stock up on Leppa Berries as well.
Personally I didn't find it all that efective, because for some reason the Bewear I kept at red health only called for help every 3 turns and help didn't come half of the time, but that might just be my poor luck