I don't see why everyone NEEDS really varied typing. Things get too complicated, next they'll have three types and fourteen new types. Odd typings can be useful, but most of the time they just gain resistances to uncommon typings or more weaknesses. I've found that single typings are usually very solid. People just want to see weird new sprites and such.
Also a berry that negates flinching would be a bit weird, hold item would work better.
Also a berry that negates flinching would be a bit weird, hold item would work better.