yeah its a joke..same as the 10 sr for 1 plat ticket which most likely gives u 1 sr backor 3 ssr for 1 plat ticket...thats rly a joke
about the trainer dungeon i just got some tickets so i can test it and its the same as with the copper dungeon it really is only good when hitting the last 2 stages otherwise its more than luck to get something "decent" out..its not worth the kobans i mean 20kobans for 1 try..
as much as i like this game over the others on nutaku it rly feels more and more like scam :O i mean i have a lot of money to push me up but i wont spend any of it since the prices are really garbage.