Messy is a friendly monster who helps school-aged children by examining science questions that help them to learn more about the world that they live in.
Messy hears a bird outside his window, but he can't understand what the bird is saying.
Messy and his friends are joined by a group of robots when they build a bridge.
Messy thinks smelly socks and cheesy feet are great, until Lofty's feet start to smell.
Messy is left feeling blue when the vacubots suck all the colour out of OKIDO.
When the Cloudship soars off, it's up to Messy to return it to its natural habitat.
Messy gets to fly Mayor Oki's plane, but he crash-lands it in a tree!
Messy and his friends have animals to save when Vivienne Volcano gets a rumbly tummy!
Messy is bored of his dino-jigsaw, so his friends help him with a real prehistoric puzzle!
Lofty has a broken finger. Messy saves the day and discovers that bones are amazing.
During Mayor Oki's birthday picnic, Messy gets into trouble with Zam's shrinkasizer.
Messy goes to OKIDO and helps his friends mend Loopy Bridge.
Messy and friends go on a rollercoaster and figure out why Stan Tall is in such a spin!
When Messy breaks the lighthouse, things get shady. But he and his friends save the day!
Messy and friends visit Fluff the Cloud's family.
Messy goes to OKIDO to help his friends solve the mystery of the dried-up oasis.
Messy and friends must play the OKIDO concert.
Messy and his friends go camping with a robot who can do anything.
Messy's tummy is rumbling and so is Lofty the giant's!
Messy and friends discover how levers work.
Messy and his friends must help to wash OKIDO clean of all the bad germs flying around.
Messy and friends explore the forest with Tweedy.
Messy wants to chill out in the snow, so he's lucky when the snowflakes come out to play!
When Mayor Oki's pumpkins aren't big enough Messy and his friends muck in to save the day!
Messy helps his friends find Zoe's lost communicator, which has ended up in the recycling.
Messy and friends enter a race in OKIDO and the various vehicles speed off!
Messy and friends go to the funfair and they end up in a giant mess with mini Mini!
Messy goes to OKIDO to play with Zim and Zam's new discovery.