One old cartoon with monsters is 'Gargoyles'. It had a wide range of mythical and fantasy monsters. The storylines often involved their interactions and adventures.
There's 'Monster Rancher', where various unique monsters are a big part of the show.
You might want to check out 'The Grinch.' It's an old cartoon with a monster-like character. The Grinch is grouchy but in an endearing way and the animation is classic.
One classic is 'Monsters, Inc.' It has a bunch of lovable monster characters and a fun story.
One old cartoon with blue monsters could be 'Monsters, Inc.' The monsters in that have various colors, including blue, and it's full of fun and excitement.
One such cartoon was 'Aaahh!!! Real Monsters'. It had a unique and fun take on monster characters.
Well, one old cartoon that could fit is 'The Smurfs'. They have various colors, and there might be blue and pink ones. Another option could be old episodes of 'My Little Pony', which often has colorful characters that might meet your description.
Such cartoons often have exaggerated and fantastical monster designs. They might focus on creating a sense of mystery or danger through the monster characters.
Typically, old monsters cartoons have darker and more mysterious tones. The storylines might involve battles, quests, or solving supernatural mysteries. Also, the animation style could be less detailed compared to modern ones.
They often exaggerate the features of the monsters to make a strong visual impact. The cartoons might also use satire to comment on current political issues related to these monsters.
There's 'Hotel Transylvania', which shows monsters in a fun and family-friendly way. It has a lot of comedy and adventure.
Often, such cartoons might explore themes of forbidden desires or the struggle between good and evil in an unconventional way.