The following are known Action Replay Codes for A Bug’s Life on Nintendo 64 (N64).

Device Compatibility: Action Replay & GameShark

All Enemies Killed
811e1a260000

Always Have Super Jump
811e1a280020

Have All FLIK
801e1a3a000f

Infinite Health
811e1a2e0004

Infinite Lives
801e1a380009

Max Grain
801e1a390032

Start with Gold Berry
811e1a2e0003

Unlock All Levels
81099150000f