This past week i've been playing EarthBound Zero a lot, and finally made it to Giygas, but lose every time. Looking at the walkthrough on starmen.net I see that Ninten, Loid, and Ana are all atleast level 30. The highest level I have any of my characters is Ninten is at 29, so that means I'm going to have to do a lot of leveling up before I can even think about beating Giygas. I was wondering if there was a easy way to level everyone up, other than going around fighting everything.

It's a little tedious but there is an "easier" way to level up. There's a swamp near youngtown which you probably passed through at some point. There's a house with a trash can in front of it. Inside Pippi will give you free healing and PSI recovery so you can just grind all you want.

Also at the base of mt. itoi there's the man in the house who gives you healing items if you'd rather level up closer to the final boss.
I'd suggest that when you have Eve just have all your characters defend and let Eve do all the work since you can level up quit a bit that way but you're already past that part.

The easy way to level up is to find a healers home (Via, Pipi near the Swamp, Dude on Mt.Itoi. Dude near Mt.Itoi, Mommy, and some guy near the cemetary) and gring up, and when you are low on HP turn back to the healers house.

From what i've done, good ol magicant works just fine. plus with all the monsters you beat, you get more cash to buy equips!

Use a game genie cheat code that gives you lots of exp. Because eb0 is not worth the time id say use matos mother 1+2 patch it plays way better than eb0 also the zunar 123s mother 2 gba trans has the same m1 trans id use that two that all I have to say

Cheating is wrong you should be ashamed.

not if the the game makes me go all mad and pissed off and make you rage I never cheated on eb0 I quit because I hate it so much I like the gba fan trans with the easy ring better
Because its uncensored and also much more playable also I'll lp it

Good lord child use some grammar and punctuation.
I almost hyperventilate just reading your posts.

Relley? Well that just sucks.

That was a joke ya know!

Either way, it appears I'm the only one who likes the original EB0 game then the MOTHER 1+2