Inside Out

Because of the magical powers of a witch’s spyglass, the roles of the household inhabitants are reversed: the cockroaches are now as big as Oggy while the cats become as small as the cockroaches! Oggy and Jack try to get the priceless object back...
Official Synopsis, ^[1]

Inside Out is the 16th episode of Season 3.

Plot

The scene opens as the witch is traveling. Midway through that, a device called the Growth Telescope was dropped down into the house of Oggy. The cockroaches, on the other hand, are cornered by Oggy, apparently for eating his lunch. Just as he is about to squash them with his swatter, the telescope drops down by the chimney and splats Oggy by the face. They laugh as he drops the swatter. Then a fencing starts by Oggy and Joey until the telescope beamed onto Joey grew big. Big Joey splat Oggy, as he controlled the Growth Telescope. He grew his friends in the process, and just like a normal telescope, there's also a shrink ray on the smallest side. Big Joey shrank Oggy, and things went all upside-down. The cockroaches are like Oggy, and Oggy is like the cockroaches. They started playing with him, until he fled away from the siege by going into their home. Things can go the opposite, doesn't it?

As Oggy was moving there, he was full of stench by the cockroaches' way of living. Meanwhile, the big cockroaches messed up the house, Oggy style: Dee Dee using clothes as a tissue; Marky, eating from the fridge; and Joey, brushing his teeth. The next morning, Small Oggy tried to seize his chance by getting back the telescope, but the cockroaches evade him out. Then the doorbell rang as Jack came back. Joey then puts on a disguise that looked like Oggy, which then, in turn, shrinks Jack after several changes like Little Red Riding Hood: Antennae, and a lot of teeth. Small Oggy then signals Small Jack to come up to the cockroaches' place. Oggy sobs over Jack about the new change, and they devised a plan to get back the telescope.

Near the windows of the house, the cockroaches shrink everything: Bob, a stranger who was walking, and then the bus driver as the bus crashed into the city like normal bowling. Until then, after fighting at taking turns to shrink, Oggy and Jack seized several chances, but failed as a chase ensues. Then the cockroaches fought as they would grow bigger at every grab like giants. Then, when Joey's head reached the moon, the witch arrives, grabbed the telescope, and turned things back to normal before the witch left. Oggy, Jack, and Bob, back to their normal heights, stomp on the cockroaches to finish them as the episode ends Inside Out.