Yungoos' teeth are so cute. I am guessing his evo may very well surpass Linoone in badassness among the early-route normal types.
Hopefully the evolution looks at least a little bit like a wolfssegner with those teeth! Definitely see it as a glass cannon with high attack and speed, with low defensive stats.
I could see them adding fighting, dark, or keeping the pure normal typing with the evolution as well.
I also like Grubbin's design. You can tell that those tusk-like antennas are used to shovel things into its mouth. As a bug-type fan, I am hopeful we will get more than one bug-line this generation! Though, would like to see a cute/beautiful bug like Leavanny, Vespiquen, Volcarona, Beautifly, and Butterfree. It's likely that Grubbin will resemble an adult grub which is anything but beautiful -- though hopefully an equally interesting design.
I am guessing the evo's typing will be either pure bug or add on a ground, rock, or steel typing provided the little helmet shielding it's head. Also I expect it to have high defense and HP, moderate attack, low specials, and abysmal speed.