This app was mentioned in 7 comments, with an average of 1.43 upvotes
First I've heard of LINE Lite. From the US Play Store page it looks to have most of the basic call & messaging features, including stickers, but it's ~6M instead of >100M. It's probably a good option if you have an older/slower device or struggle with battery life.
Personally, I'd miss themes.
Official accounts like Nintendo's seem to use custom content in chats so I wouldn't be surprised if that's another missing feature in the Lite version; I like getting these monthly calendars, so I'd be sad about that too.
I don't think I'd miss backups or many of the other features from the regular version, though. There are some cute gimmicks like polls and fun ways to add friends, but I haven't found other US users to try them with.
The account's username is @pokemon
for anyone who just wants to add via username (notably, in the Lite LINE app, which doesn't seem to support QR codes)
EDIT: Looks like Line Lite doesn't support the characters the bot is using. Helpful!
The app you are looking for is this:
https://play.google.com/store/apps/details?id=com.linecorp.linelite
Having Zbot is a huge help and it is definitely recommended to use. Zbot is a paid service ($5 per month) so you will need one person in your guild who has access to it in order to make use of it.
Talk to your guild leader and make them fork out those $5 as it will help your whole guild along by quite a bit.
Edit: If your guild doesn't want to invest in it, then check out the guild I am in "Nut Up or Shut Up". We don't have a card requirement and only ask for full participation on events (3 misses and you are out). Don't think we currently have a spot available, but we have new players join it quite regularly.
Does it do the same thing if you download Line Lite??
https://play.google.com/store/apps/details?id=com.linecorp.linelite