I'm going to post more videos on tips/glitches you can use if this is your first time playing through the series. I would highly advise you to playthrough Suikoden 1 and then (if you get all 108) 2. It gives you an additional character from the first game that is very OP.
However, as an aside. There is a pretty notorious side quest in Suikoden 2 involving the character Clive. That requires speed runner level knowledge of the game to achieve. This has been offset by a huge QoL change. Simply go into settings, turn off the 'Pause Event Timer' option and the in-game clock is off. Removing the time limit to the side quest.