Forum Thread
What is worth buying?
Forum-Index → Discussion → What is worth buying?but after it gets easier ^^" Most items are worth it. The Pokeradar and Egg Radar Chips are worth it if you want to shiny hunt, as the Egg Radar Chips let you find eggs in the tall grass.
And, yes, you need to buy batteries - the cheapest point is either PD or electric gems, because nuggets cost 1.5k PD each (so, 50 nuggets is actually 75k PD) which is higher than the 50k you have to pay for a battery.
50k is pretty fair, because you can manage to sell shinies between 100-200k (as long as they aren't extremely common shinies) so you can make a profit and go back to hunt more (and keep making a profit.)
You have to buy a battery for each hunt you do, unless you're premium (which costs a fair bit of nuggets, though).