Most people don't actually use the NFC, It's just not as highly accessible in North America as it is in other places (Also, very specifically, Amiibos will not work, and this is an in-game notification as well. No idea if this was a licensing thing or what). It's an interesting gimmick to replace how Swapping out CDs worked for the original Playstation game, but most people use the Keyword generation in the North American version.
Thankfully, we solved how keywords worked. After scripting out auto-solving more than 2 million keywords, and filtering out duplicates, we have published options for every baseline, and every variant (stuff that has different stat gains, starting stats, starting techs, or faster guts regeneration from the baselines).
- Keyword Solver for manual entry of any keywords you want, to see what it will produce
- Curated list of Keywords: Pick a Kaiju main, then Kaiju sub. Below the choice will be a scrollable table of all the Script-found Kaiju and fan-submitted Kaiju
NTAG scanning and Bus Passes are solved too.
The bus passes are fun/interesting because the remaining balance of Yen on them is what determines what it makes. Many of the numbers are references to Ultraman or Monster Rancher lore. If you're curious about that, check out: https://legendcup.com/faq-ukmrnfc.php
The remaster of MR1&2DX (Steam/Switch/iOS) does have a random button in addition to a searchable internal database of Albums, Song titles, and games.
For whatever reason, the Random button in Ultra Kaiju is absent from the North American version, so you just either have to enter in some random letters/words in the Keywords field, or use NFC. The Japanese and Southeast Asia versions of Ultra Kaiju have a CDDB and Random button, though the "CDDB" is a bit misleading because it actually uses the keywords lookup to generate the Kaiju from the CDDB entries. In this regard, at least, the North American version is superior since the Keywords aren't locked to a pre-defined list.
Why did JP and SEA get a Song List and NA got Keywords for UKMR? Maybe copyright or licensing, though it's honestly anyone's guess.
But it still would have been nice for them to keep the Random button :)