For those interested in the nitty-gritty details, here are the full patch notes for update 1.25.0 - part 2:
On the other end, silence, fragile as glass. Then Marcelo laughed, and it sounded like rain. "Yes. Vamos." Mortal Kombat 1 -NSP--Atualizacao 1.25.0-.part2...
To successfully install the v1.25.0 update on a Nintendo Switch (via custom firmware or emulator): For those interested in the nitty-gritty details, here