Alto's VF-25F Tornado Pack (STEP 1)
During Stage 35 (Celestial Being), you will be given a choice on who to let into Alto's cockpit: Sheryl or Ranka. Choose either one.
Alto's VF-25F Tornado Pack (STEP 2)
During Stage 38, you will be given the choice again. Choose the same person as last time.
Alto's VF-25F Tornado Pack (STEP 3)
Alto must have a kill count of 70 or higher before he enters the Vajra Nest in the middle of Stage 45.
Chirico's Scopedog TC-ISS (STEP 1)
In the prologue battle to Stage 39, have each allied unit defeat at least one enemy each.
Chirico's Scopedog TC-ISS (STEP 2)
During the main battle of Stage 39, Chirico must defeat Ipsilon (white haired young man). He will run when his HP falls below 8000.
Chirico's Scopedog TC-ISS (STEP 3)
Chirico must have a kill count of 70 or higher before the end of Stage 39.
Holland's Terminus 303 SP Booster
Holland must have a kill count of 50 or higher before he leaves the party in the middle of Stage 33. You will recieve the unit later, during Stage 49.
Marguerite's Pearl Nail (STEP 1)
During the route split that covers Stage 34 to Stage 36, you will fight Marguerite (blonde woman). Defeat her with Crowe.
Marguerite's Pearl Nail (STEP 2)
During Stage 42 (Earth) or Stage 43 (Space), either convince or defeat Marguerite with Crowe. Either one is fine as long as Crowe does it.
Marguerite's Pearl Nail (STEP 3)
If you completed the previous steps, Marguerite will join you, with her Pearl Nail mech, during Stage 49 after either she or Schwar is defeated.