Well here ya go

(These are some of my favs)

X/Y Snowbelle City

https://www.youtube.com/watch?v=aWK7L-XzRcY

Other version which I like more (which they also used for the Litten/Stoutland scene but deleted later on)

https://www.youtube.com/watch?v=ZyUkHwfygNU

B/W Driftveil City

https://www.youtube.com/watch?v=zhcA0RkVE-4

R/B/Y Lavender Town

https://www.youtube.com/watch?v=JNJJ-QkZ8cM

OR/AS Slateport City

https://www.youtube.com/watch?v=b7DsYkZz7Jk

B/W Icirrus City

https://www.youtube.com/watch?v=-CHYQm1-kJA

B/W Undella Town (spring, autumn & winter)

https://www.youtube.com/watch?v=7GTlTtnbnhY

S/M Konikoni City (night)

https://www.youtube.com/watch?v=3XGaM5WLjxI

Also this one because me and my brother spent so much time on this and I was so happy when I defeated them (my bro was the Pkmn master, not me)

https://www.youtube.com/watch?v=bqcAQ-Ii6VU