> This song is actually a cover of the theme song from Japanese TV Crime Drama, "Bayside Shakedown", (踊る大捜査線 Odoru Daisōsasen) ..which is itself a remix of the traditional Mexican song "El Cascabel".
I just realized the Robot Master's weaknesses songs match the same tempo as in their original. Kinda hard to explain but Bubble Man's portion in Heat Man's song goes onto his actual song which keeps the speed and bpm from the last song. And it does the same for the next RM. It's more noticeable in Metal Man onto Crash Man.
TetriNET is a very, let's say, unheard of game. It's weird, it seemed like everyone was playing it in the late 90s, early 2000s but nowadays, nobody knows what this game even entails. I think the answer is probably Tetris Company. After their malicious cease and desists reached this unfortunate game, it shut down and stayed that way for 4 or so years. Which makes sense why popularity eroded away. It's fanbase slowly left and left until it was 0.1% of it is potential userbase after starting back up. It is now only a shell of what it used to be. A dust in the wind that used to be the wind itself. Rest in Peace TetriNET. Thank you for all the fondest of memories and experiences through the years you pulled through. T_T 1997-2007