Super Bomberman 4: Normal Game: Level 1-4 to 1-6

The rest of the Aeon/Primeval Era takes place in one of its caves. 1-4 is unique that it has a Wohho Warehouse that keeps spitting out more of those Cavemen.

Super Bomberman, Bomberman Wiki

Super Bomberman 4 Guides and Walkthroughs

Super Bomberman, Bomberman Wiki

Super Bomberman - The Cutting Room Floor

Super Bomberman 4: Normal Game: Level 1-7 to 1-8 (Hammer Bomber & Dogun)

Super Bomberman 2: Normal Game: Level 4-1 to 4-3

Super Bomberman 4: Normal Game: Level 4-4 to 4-6

Super Bomberman 4 – Obsolete Gamer

Super Bomberman 4: Normal Game: Level 2-4 to 2-6