I have a battery save for both games with everything unlocked if you're interested.
With the advent of cheats, that shouldn't be necessary.
Excellent. I'll add that too.
You should really use your talents to scour for unused content too and post them on TCRF.
When looking for unused content it's helpful to have intimate knowledge of what is and isn't accessible normally. I don't usually have that kind of knowledge. Ironically, of all the games I've mapped, only one had I played previously (and it wasn't this one).
However, I noticed that this stuff may be unused:
It's a map for a hole. Some of the tiling is wrong (especially evident on the bats). Both exits lead to the overworld with no way to return.
The same map exists in Alert! (also map 0x13) with correct tiles.
It's some kind of cellar. There's a box containing 3 Dyn-O-Mite, but when picked up Marvin starts babbling about a radar (a radar is one of the first items you receive in the game). The exit leads to inside the haunted house with no way to return. This map exists as part of normal gameplay in Alert!.
Another map for a hole. Unlike almost every other hole, the exits aren't marked with lit areas. Both exits lead to the overworld with no way to return.
It seems to be a subtle remix of map 0x30 from Alert!. The layout is a little different. The warp points are in the same places except Alert! has them properly marked.
Yet another map for a hole (noticing a theme yet?). Both exits lead to the overworld with no way to return.
It seems to be a subtle remix of map 0x31 from Alert!. The layout is a little different.
It's a store unlike any other in the game. It's fully functional but seems to be unused. The exit leads to wherever you were last on the overworld.
There are three stores that I know are accessible in the game. Two of those stores use the same map. Perhaps all of the stores were originally going to be unique.
The first floor of a hotel. It's unlike any other hotel in the game and seems to be unused. The stairs are nonfunctional and the exit leads to wherever you were last on the overworld.
The hotel is functional in that you can sleep there, but then you'll wake up in the Blue Town hotel. Creepy. Exiting afterward will still lead you to wherever you were last on the overworld.
It's similar to map 0x48 from Alert!, but with the addition of a window, different walls, and different stairs.
Also, there are cutscenes for when Bugs and Marvin sleep at any hotel. No, not with
... not even at the same time (that
would've been some good TCRF material!). The Bugs sleeping cutscene I think was used in Alert!, but as far as I know only the Marvin sleeping cutscene is ever used in Marvin Strikes Back!. The Bugs sleeping cutscene is probably just a leftover from Alert!.
The following are maps I think are probably used at some point, but don't know where. Knowing their names and how to access them would be immensely useful. Any help would be appreciated. Those maps are:
Map 0x2B: This is under the lake. In Alert! this map was accessible by destroying a boulder at the bottom of the lake. In Marvin Strikes Back! I don't know how to access it or if it's even possible to do so normally.
Map 0x4B: A mysterious underwater area
Maps 0x4F, 0x50, 0x51:
These are connected and form some kind of underground base I've learned that this is the secret base from one of the secret missions.
One of the ladders crashes the game when used. Maybe it's due to an invalid state (i.e. not having triggered some story-related thing). Alternatively, maybe the gate in front of the ladder (not pictured) never opens in-game, making it my own fault for using a walk-through-walls code.
It's some kind of organic structure It's K-9's brain and is part of a secret mission
I also added your codes to gamehacking.org
I think that it's fine that you posting this stuff on other sites. However, it would have been a good idea to ask first just in case.