Infinite coins hint:
Upon reaching the point in the storyline where you get the chests in the chieftess' hut at Woodburrow that the person refills every day, open the chests and grab the coins. Once done, go to the "Level Select" screen and enter a level. As quickly as you can, open the menu and return to Woodburrow. When you get back into town the chests will already be refilled. Repeat this process for infinite coins. This results in about 440 total coins and takes 30 to 45 seconds to repeat.
Bonus Mission Map Locations:
Go to the following locations and perform the corresponding tasks to unlock a Bonus Mission Map:
LOCATION - HOW TO UNLOCK
Woodburrow - Complete Mesmerelda's Show to have this mission appear near Flynn's ship.
Mount Cloudbreak - Toward the end of the level you'll see this Swap Zone to the right. Use a character with the Climb ability to activate it, then complete the challenge to receive a Bonus Mission Map.
Rampant Ruins - Enter Orangutan Tower and look to your left to spot a Swap Zone. Use a character with the Climb ability to activate it, then complete the challenge to receive a Bonus Mission Map.
Iron Jaw Gulch - Activate and cross the bridge in 10,000 Gallon Hat, then enter the large battle near a Life Elemental Gate. Take out the enemies and use a Life Skylander to open the gate. Bounce on every platform inside to open the gate and claim your prize.
Motleyville - While going through The Secret Way you'll find a dual Air/Water Elemental Gate. Use a Swap Force character with these attributes (or two appropriate Skylanders, if you're playing co-op) to open the way. Complete the course inside to earn this.
Twisty Tunnels - You'll be near an Air Elemental Gate after beating the Boom Bosses in Perilous Plateau. Use an Air Skylander to open the way, then clear the course inside to earn this reward.
Boney Islands - After launching from the caravan, you'll land in Paleo Pass right next to a Swap Zone. Use a character with the Climb ability to complete the challenge and earn this map.
Fantasm Forest - After you battle the Tech Gear Golem in Fantasm Village, you'll approach a Swap Zone. Use a character with the Rocket Ability to complete the course and earn this Bonus Mission Map.
Kaos' Fortress - After you escape from the second Sheepshooter explosion, head straight forward to reach a Swap Zone. Use a character with the Climb ability to complete the course and receive this.
Easy 3 stars on any bonus map:
Start a game in Hard mode (or Nightmare if you've unlocked it) and select a bonus mission. When the mission begins, change it to Easy. The clock is longer on harder modes, but when you change the difficulty, the longer level time stays and the enemies are easy. When you complete the bonus level, the time bonus will be very high.
Welcome To Woodburrow - Complete Mount Cloudbreak on any difficulty.
Swamp Secured - Complete Mudwater Hollow on any difficulty.
Ruins Romped - Complete Rampant Ruins on any difficulty.
Glumshanks De-Evilized - Complete Jungle Rumble on any difficulty.
Lawman - Complete Iron Jaw Gulch on any difficulty.
New Law in Town - Complete Motleyville on any difficulty.
Squid Squabble - Complete Twisty Tunnels on any difficulty.
Vexed Viper - Complete Serpent's Peak on any difficulty.
Cold Caravan - Complete Boney Islands on any difficulty.
Snowball Fight! - Complete Winter Keep on any difficulty.
Blizzard Bailout - Complete Frostfest Mountains on any difficulty.
Puppet Master Pounded - Complete Mesmeralda's Show on any difficulty.
Woods Wetted - Complete Fantasm Forest on any difficulty.
Kastle Krashed - Complete Kaos' Fortress on any difficulty.
Kalamity Averted - Complete Motherly Mayhem on any difficulty.
Kaos Quashed - Complete Cloudbreak Core on any difficulty.
Boom! - Light the fireworks in Woodburrow.
Perch Plunge - Dive off the Tree in Woodburrow.
Newsworthy - Use the signpost in Woodburrow to see the Message of the Day (online only).
Golem Graveyard - Defeat 10 Golems.
Race to the Finish - Complete your first Time Attack level.
Mad Dash - Earn a 3-star rating in any Time Attack level.
Speed Demon - Earn a 3-star rating in 3 Time Attack levels.
Reach for the Sky - Complete your first Score Mode level.
Racking Up the Points - Earn a 3-star rating in any Score Mode level.
High Roller - Earn a 3-star rating in 3 Score Mode levels.
New Challenger - Complete your first Bonus Mission level.
Up and Coming - Earn a 3-star rating in any Bonus Mission level.
Slings and Arrows - Complete your first Team Survival Arena level.
Fastest One Around - Earn a 3-star rating in 17 Time Attack levels.
Winning Streak - Earn a 3-star rating in 17 Score Mode levels.
Rising Star - Earn a 3-star rating in 3 Bonus Mission levels.
Enduring the Onslaught - Earn a 3-star rating in any Team Survival Arena level.
Heroic Champion - Earn a 3-star rating in 5 Bonus Mission levels.
Coming out Ahead - Earn a 3-star rating in 3 Team Survival Arena levels.
Champion of Skylands - Complete all main chapters in Story Mode on any difficulty.
Times are Hard - Complete all main chapters in Story Mode on Hard difficulty.
Knight of Nightmares - Complete all main chapters in Story Mode on Nightmare difficulty.
NO WAY!!!!!!!!!!!!!!!!! - Earn all Bronze, Silver, and Gold trophies.