-Easy mode gives you higher exp.

-Rad ghost and super rad ghost can give you good exp, but you'll have trouble fighting them until the late game.

-Some of the later everchip arena cups will let you buy exp boosting trinkets and armor.

-One of the furniture sets gives you an exp buff witch i'll put in more detail later.

-DARK DUNGEON
-dark dungeon is an entire rougelike board game in everchip. there's tons of great equipment to get that just totally breaks the game. But more importantly for our purposes, its a really easy way to just fight a ton of enemy's in a row that give good exp before they show up in the story.

-LAND OF FISH
-about halfway through the game you'll end up in the shinryu fish concern. if you make your way to the big goldfish looking dude in the pile of dead fish, you can bring him to the fountain in shinryu
to open up the land of fish. you can get pretty decent EXP and money here.

-RAINBOW PARK
-Once you have the airship, you can go to rainbow park, a relatively low difficulty area that nets
really solid EXP. There's also super rad ghosts here that make the whole process easier.

These things suck.
They've got crazy speed, resist physical attacks, and constantly spam ability's that make them even harder to kill.

The only way to kill them consistently is to use hyperactive and annoying squawk as the bird, and then use helga and andrew to just completely eviscerate them with magic.

A notable skill that makes this easier is molecular beam, witch does 600% magic damage and cost 120 MP. an insane cost, but totally worth it, sense the super rad ghosts give 10'000 EXP, enough to rival most bosses.

I mentioned earlier that the easiest place to find these guys is rainbow park, and you can get molecular beam by finishing accelerated dynamics in shinryu, witch is pretty hard to get into,
but you can use the dark dungeon to grind money super fast so its all good.

The pixel set is one of the best furniture sets in the game, giving a huge 25% EXP bonus to your whole party. Its a rare set that you can get in everchip.

-The treasure chest is in castle dragon you have to go through the mirror first though.

-The weapon rack is hidden in kung fu tower.

-The throne is in kingland, you have to go to the castle and shake a guard.

-The fountain is in mulgrens temple

-The tree is in kings march

-The king is earned in the arena.

Its a little annoying to find all this stuff, but its totally worth it. This takes a lot of slots, so i'd recomend doing the ultimate construction dungeon near the wilted lands for a bigger clubhouse.