To reach Okaara, complete the Green Lootern's "Permission to Launch" Quest in the Watchtower to enter the Moon Base. From there, you'll need 10 Gold Bricks and have completed the Need for Greed level to construct the portal that will send you to Okaara. Vertical columns of light will point out the location of every collectible. Grapple the orange plug on the side of the tower (it's under some brush) to reveal a switch that will open the container on the top. Shatter the glass window on the front of the building pictured above with a sonar attack. Waltz on in and destroy the boxes inside until you find a mound of dirt. Dig up a few bricks and interact with them to build a switch. Pull the switch to open the small container which houses your Gold Brick. Use a Dive Suit or Aquaman to find a button on the bottom of the pond. Stepping on it will open the door to a nearby temple. Head inside and defeat all the Orange Construct Warriors to claim the Gold Brick. Use a giant or super strong character to punch through the cracked double doors of the large temple.
Head in and blow up the silver objects with an explosive attack. Now melt the gold chest in the center with a laser and the Gold Brick is yours. There are three races found on Ysmault and each will earn you a Gold Brick. One of the races is clearly designed to be run on foot but you can still complete it with a flying character. Put out the flame pictured above then step on the button to open the container on the building across the way. Inside is a Character Token. Dig in the dirt piles in front of the small cave to find an orange plug. Interact with it to slap it on the cave then grapple it to open the cave which houses a Vehicle Token. Destroy 10 blue Batman flags in and around the lake. As a few of the flags are submerged, this challenge may be easier if one of your two active characters can fly and the other has a Dive Suit. Get the ones underwater with the Dive Suit then switch to the flyer to mop up the rest. Use Aquaman or a Dive Suit to bust open the chest at the bottom of the lake to claim the Vehicle Token.
Destroy the silver object on the building pictured above to rescue Adam West. Follow Loontern wherever he leads and beat up any bad guys that attack. Follow Loontern and beat up all the Orange Construct Warriors. Fly around until you find a swarm of bats. Use a character with the 'sense' ability to detect a bunch of studs in the shape of an arrow. Follow the arrow to another 'sense' spot where you'll detect another arrow pointing at a building with a bunch of gold objects in front of it (if you didn't melt them earlier, that is). The object Loontern seeks is inside. Grab it and take it to him. Chase Loontern down and smack some sense into him. As soon as you catch up to him, punch him until the quest is complete. Follow Bat-Cow around and beat up any Orange Construct Warriors that attack. To reach Oa, complete the Green Lootern's "Permission to Launch" Quest in the Watchtower to enter the Moon Base. From there, you'll need 30 Gold Bricks and have completed one of the Lantern planet levels to construct the portal that will send you to Oa.
The portal itself can be found outside the Moon Base. You can reach it through the vent inside the base or by simply walking outside and looking for it. Shatter the glass crystals behind the entry portal with a sonar attack then dig in the dirt underneath to unearth the bricks needed to build a Spinner. Push the green side to open the small building next to you and grab the Gold Brick inside. Destroy the gold lock on the building pictured above to open the door then send in Robin's Toy Wonder to access the Techno Terminal inside. There are three power supplies powering the laser grid protecting the Gold Brick. Bust the nearby green crystals and charge the Electricity Terminal behind them to turn one off. Next, use a stealth character to sneak in the nearby building and throw the switch inside to turn off another. Finally, use a giant character to bust through the cracked ground and step on the button underneath to deactivate the laser barrier. Destroy the green crystals at the base of the spire pictured above and build a Techno Terminal out of its remains.
Use the terminal then hop up the platforms (or fly) to the first switch and pull it. Work your way up, pulling switches as you go until you reach another Techno Terminal. Use it and a box on a nearby platform will open up. It's a Gold Brick! You'll find a plastic tunnel on top of one of the spires. Shrink The Atom (or use the Mini Characters cheat) and send him in the open end. Work your way down the tunnel, hitting the buttons as you come to them to clear a path. Step on the button at the end and it will open a nearby container. Exit the plastic tunnel and collect your Gold Brick. Did you want to try out those vehicles you've been collecting? This is the place to do it. There are 12 races on Oa and each one awards a Gold Brick. Use projectile attacks on the three targets around the building. Each time you hit a target, one of the torches will lite. When all three are lit, the building will open. Equip a Hazard Suit before heading in to collect the Character Token. Find the small building surrounded by three torches.
Extinguish the flames and the front door will open. Send in a character with super strength (like Superman) to smash a hole in the cracked floor to uncover a button. Step on the button and collect the Character Token. Use a character with the 'sense' ability to detect a set of footprints. Follow them to another 'sense' spot. Keep following footprints until you come to a dirt mound. Dig in the dirt to uncover a chest with a gold lock. Use a laser to bust the lock and interact with the bricks inside to build a Techno Terminal. Use the terminal to open a nearby container housing the Character Token. In a canyon you'll find five rocks shaped like chickens. Destroy them all within the time limit to earn a Vehicle Token. On top of one of the tall spires is a swarm of bats. Use someone with the 'sense' ability to detect a button on the floor. Step on it and the nearby structure will open up revealing a switch. Pull the switch and another will open up. Blow up the silver box inside with an explosive attack and interact with the resulting bricks to build a Spinner.