Hidden Summons

[Evastio]

Just wondered if anyone has ever found all the hidden summons. I know where to get them all but they are a pain to get. I've gotten Goblin which is the easiest. I got Mind Flayer which took quite a few Sirens!! I just can't seem to get Cockatrice (fought over 999 of them!) or Bomb. I am determined to get all of them in the GBA version.

I got the Imp summon in the Baron Desert while I had the twins and Yang in my team in FF2 SNES.

I got the Cockatrice summon at Mt. Hobbes during my first time going thereon FFIV Advance.

I've never gotten the Bomb or Mind Flayer summon.