Is this game focus on single play rpg or multiplayer?

yesterday defeated Slimamander the boss 
Jibanyan the best 

Ya my friend evolved him into badxxxx something(forgot the name) XD
But i plan to keep him as jibanya until i finished the game then only evolve him
Ps: the traffic police Snartle damn strong <.<

I still struggling to befriend with him 
my watch still D rank, my friend advice me better catch him while my watch rank is low
but no luck so far =_=

actually i try to spam a lot of foods on recovering hp
by the time i beat him, my team only left 1-2 yokai
money out, nothing in 

actually he quite strong, according to my friend
(She had finished the game while I still stubborn on D rank watch )
I spent most of my money on food also, like buying those premium meat and ramen 

Finally  after so long ...
(@&%#¥£$)

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I only play at home, so charging cable is always there 
actually quite many times, i reset with marbled beef (very expensive meat  )
after i bought the beef, i stand in front of the traffic light, i save game, then i encounter snartle.
if no befriended, i loaded my previous progress 
It took my around 1 week, I almost going to give up the game because of him