Well, one option is to search on popular online auction sites. Another possibility is to check with local comic book shops that might have some old Batman toys in comic form in their inventory. Also, you could ask collectors' groups or forums for leads.
Old toys in cartoons are often depicted as having unique stories. They might have been passed down through generations or have some sort of mystery attached to them. Plus, their appearance can add a retro touch to the cartoon's setting.
The features of old Transformers cartoon toys include retro styling, basic playability, and a charm that comes from their representation of a beloved franchise. They might not have the complexity of today's toys but hold a special place in fans' hearts for their simplicity and nostalgia.
I remember the old He-Man action figures. They had a lot of detail and came with various accessories. Also, the Teenage Mutant Ninja Turtles toys were a big hit back then. They had different characters and weapons.
The main features of such toys and cartoons could be their novelty and interactivity. The magnetic feet add an element of surprise and fun. Also, they might have been popular for their creative approach to character or object movement.