Lionbreast is the Breastforce partner of the team's leader, Leozack. Savage and cruel, it will happily obey his every command. Lionbreast can transform into both a mechnical lion and a handheld blaster.
- Leozack (Breastforce, 1989)
- Japanese ID number: D-329
- Released only in Japan, Lionbreast was packaged with his partner, Leozack.
- Liokaiser (Multi-pack, 1989)
- Japanese ID number: D-335
- Leozack (and thus Liobreast) was also available in a complete six-piece box set of the entire Breastforce team. It's worth noting that this release does not have bio/tech cards for the individuals, only the combined form.