Is there any way to get bonus go pass tokens before the pass ends

I really want to get the giratina since I'm progressing quite quickly and I just want to encounter it, but I don't think I'm going to have enough points to achieve level 100. This week's set of weekly questswill take my to ~80 but that's still 20 more levels to go and I'm not sure if the daily quests with carry me up those 20 levels before it ends. Anyone got any knowledge on this?