I just found it very annoying to run into bidoof and bibarel every 5 seconds... they are the zubat of D/P/Pt!
And now that zubat appears outside of caves at night, we have another reason to stay out of the grass at all times (bidoof/bibarel at day, zubat at night) And to make matters worse, even the trees attack you now (snover). And on top of Team Galactic trying to kill you/erase you from existance while destroying that as well, this proves Sinnoh is easily the most hostile place in pokemon. At least it isn't Soviet Sinnoh that appears in D/P/Pt...