I found all the season 5 Episodes on a swedish website called tv-serier.nu
[spoiler]
1 the cutie map(1)
2 the cutie map(2)
3 castle sweet Castle
4 Bloom and gloom
5 thanks for the memories
6 appleoosas most wanted
7 make new friends but keep discord
8 the lost treasure of griffonstone
9 slice of life
10 princess spike
11 party pooped
12 amending fences
13 do princesses dream of magic sheep?
14 canterlot boutique
15 scare-master
16 rarity investigates
17 made in manehattan
18 brotherhooves social
19 crusaders of the lost mark
20 the one where Pinkie pie knows
21 hearthbreakers
22 what about discord?
23 the hooffields and mccolts
24 the mane attraction
25 the cutie remark(1)
26 the cutie remark (2)
13 Princess Luna episode
19 CMC revealed that some condition means they’ll never get their cutie marks (Apple Bloom because cutie pox, dunno about the others but Scootaloo’s is probably connected to her flying somehow)