Some of the classic old cartoons with underwater settings include 'The Octonauts'. It's educational and fun, showing various underwater creatures and their habitats. 'The Penguins of Madagascar' has episodes that take place underwater too. And don't forget 'Jake and the Never Land Pirates', which has many underwater treasure-hunting adventures.
There are several like 'The Little Mermaid' and 'SpongeBob SquarePants'. They have great underwater scenes and stories.
You might remember 'Finding Nemo'. It's a heartwarming story about a fish's journey underwater. The animation is amazing.
You could check out 'The Adventures of Tintin: Red Rackham's Treasure'. It has some underwater sequences that are quite exciting. Another option is 'Aqua Teen Hunger Force' which has a unique take on underwater scenarios in a comical way.
One such cartoon could be 'The Jukebox Adventure,' where the main characters go on a quest to fix an old jukebox. It's full of fun and surprises.
There's 'The Jetsons' which had some cool robot characters. It was a popular show back in the day.
There's 'Yogi Bear' for sure. It's a well-known old cartoon with a loveable bear character.
Well, 'The Adventures of Rocky and Bullwinkle' has a squirrel character and is a classic. It has funny storylines and great animation.
There are many, like 'Tom and Jerry' where the cat and mouse's antics are always fun. Also, 'Winnie the Pooh' with its charming animal characters.
There's Bugs Bunny from Looney Tunes. It's a super classic and loved by many.
Well, 'Hello Kitty' could be considered. Although it's not a traditional cartoon with a storyline, it's a very popular and classic image of a cute cat. Also, 'Felix the Cat' is an old one with Felix getting into all sorts of adventures.
There's 'Thomas & Friends' - it's a well-known one. The show has various train characters and their adventures.