DBZBT3's Hidden Missions - Breakdown

These "hidden missions" may be "hidden", but they aren't really missions. In fact, they are Incorrect Mission Entries.

Take the "Bardock War" mission entry for example.
* Why is the 101st mission named "Bardock War"?
- Because Mission 100 & Survival are part of the same subarchive. Therefore, both modes have to share the same text.
Survival's Mission Names are stored right next to Mission 100's, so the 101st mission for Mission 100 has to share the same text with Survival's 1st mission (Bardock War).
https://imgur.com/WqQZ8Z4
* Why are the mission parameters.. off?
- That's because the game is loading incorrect information for a mission whose parameters don't really exist in the first place.
That is also why the mission parameters are as follows:
-> 00 00 00 00 - Referee (Ox King)
-> 00 00 00 00 - Timer (Infinite / No Timer)
-> 00 00 00 00 - Map (Wasteland - Noon)
-> 00 00 00 00 - BGM (The Meteor)
-> 00 00 00 00 - Mission Type (Defeat enemies using 1 fighter!)
-> 00 00 00 00 - Destruction Point Limit (No DP Limit)
-> 00 00 00 00 - 1st Opponent ID (Chiaotzu from the Crane and Turtle Style Mission)
-> 00 00 00 00 - 2nd Opponent ID (Chiaotzu from the Crane and Turtle Style Mission)
-> 00 00 00 00 - 3rd Opponent ID (Chiaotzu from the Crane and Turtle Style Mission)
-> 00 00 00 00 - 4th Opponent ID (Chiaotzu from the Crane and Turtle Style Mission)
-> 00 00 00 00 - 5th Opponent ID (Early Goku from the Battle Against Vegeta Mission)
NOTE: These are the additional mission parameters we're talking about.
Since the incorrect opponent ID's already load the opponent parameters from two other missions, the 101st mission's main parameters are left unused.
https://imgur.com/CzGrn9w
* Why do (most of) the other missions crash the game?
- Mostly because those Incorrect Mission Entries load wrong map/character ID's.
-> There are only 161 characters in the game, so any ID higher than A0 will crash the game.
-> There are only 35 maps in the game (random map doesn't count), so any ID higher than 22 will crash the game.
-> I'm not so sure about the other ID's, but incorrectly loaded BGM for example won't really crash the game in theory. It will likely force the game to play no BGM at all, or some other voice file.
* Is it possible to add more missions to the game, while the cheat code is still in use?
- Indeed, but like I said before, Mission 100 & Survival share the same text, which is why I wouldn't really recommend adding more missions to the game. Surely, it may be possible (both in theory AND in practice), but it's not recommended at all.
You're better off editing already-existing missions instead.