This is the final product, a small cheat.dat file (for mame 126 or earlier) that allows you to monitor and change rank for those 3 raizing games.
The options are:
-Display rank (hex) : displays the current rank in the top left corner (in hexadecimal) turning it on and off multiple times allows to lower the display a bit so it doesn't block score
-Display rank (decimal) : same as above, in decimal.
-Display per-frame increment : I think this is only useful for garegga, it shows the current rank change on a per-frame basis. I'm pretty sure these values are fixed in batrider and bakraid
-reset to the easiest rank: This resets the game to the easiest rank value (the highest number is easiest)
-MAX RANK NOW! : This sets the game to the hardest rank value (mostly for fun)
-Change Rank : This lets you select the desired rank value in HEX
-Per-Frame Rank Freeze : This allows to freeze the per frame rank counter
Here is the file, just put in in your main mame directory (same as mame.exe) then load any of the games and under the options are under "cheat" gui menu. To be used with mame 126 or older (shmupmame suggested

http://www.mediafire.com/file/camu2qzm865670d/cheat.dat
also, this only works with the commonly used sets they are:
Battle Garegga (Europe / USA / Japan / Asia)
Armed Police Batrider (Japan, version B)
Battle Bakraid - Unlimited version (Japan) (Tue Jun 8 1999)
Here's what garegga can look like with close to max rank in stage 1 (it's harder than it looks)

Finally, if anyone can test and tell me what the oddly named cheats are in garegga that would be appreciated. I think the one named "Relief Option 5 pieces" means that the next option will be the search special option.