darkSpyro

Now that i have all the Skylanders i want to lvl them up thats the easy part. What is the best way to make money in the game to buy all there skills?

I either run through Kaos' Lair or do the rock-'em-sock-'em robot fighting sequence on that armory level then quit. Usually get around 1200 per run.

Kaos' Lair by far. Takes me an hour to fully level up & buy all upgrades. You just leave the level before you head into the boss fight.

Lair of Kaos or Quicksilver vault until you get to the pushing of the blocks

theres the dragon treasure glitch too, but that doesn't level you up and is pretty boring getting 250 a time

Well the Molekin Mine is the fastest way to make money if you don't need experience. You get tons of money in there and it takes 5 min. to fully clear at max. Plus if you use the pirate seas chest you can loot the same chest while clearing the dungeon around 5 times easy. I usually get around 3k in one run of the mine with the chest.

I decide to do parilous pastures
1. if you go inside the tech gate at the beginning there is 700-900 coins in there
2. and further through the level (where the element magic is strongest) there is 200-250 coins outside the little tower

Its how I decide to do it because I real want to earn money not XP and have to wait a long
time to kill an enemy
so I chose to do a level with low health enemies

But Ive read every one elses Ideas and I might decide to change the level
on my last 4 of 37 characters I need : as the money
they get seems to give 4-6 small upgrades,or 2-3 medium upgrades,or 1 big upgrade in 1 go

If you're on the Wii version, use the Dragon Chest glitch. What is this glitch, you ask? Well, only on the Wii, the chest is usable in the Ruins area, and infinitely. Once you've found it, all you need to do to reset it is talk to an NPC. Since, as you say, you've beaten the game, keep setting and removing the chest from the Portal of Power until you get the spawn point that's right on top of Cali. That way, you can talk to her, open the chest, talk to her, open the chest, infinitely. You'll have full upgrades in a matter of 10-15 minutes per character.

Then, take them to Lair of Kaos for EXP. On PS3 and 360, just take them there for both, because the chest won't work for you.

Usually I just go to the Lava Lakes and run around breaking everything, then exit the level once I get to the puzzle block area. It's a bit safer than the later levels and pays out pretty good.