about Kurogane not using Souhi is because maybe Mokona is not with them and is being in different place. well it's also possible that they cannot bring stuff like Mokona(^^) to the stage, so they might leave somewhere else, and the tournament not letting used their own weapon, and the other crazier and weider possibility is that Mokona lost and become something like 'prize' that the gang must win in the tournament.
there will be no chapter next week, right? for the next chapter, a continous from ch 136 or a flashback..hmm which one is better?