An Extensive Tutorial on RPG Movement using Sprite to Map Collision

Explains how to make basic RPG movement in medium detail
haloopdy

The ultimate Circle Pad tutorial.

Want to use the circle pad? Everything is explained here.
Sam

Using Sprites as Stateful Entities

Improve your code by wrapping state into your sprites!
snail_

Simple Bullet Tutorial

How to make a simple game with bullets.
haloopdy
seggiepants

String Mapping

How to save map data into a TXT file
???

Using DATA to improve your program (Debug; Code readability; and more)

How to use DATA to optimize your sourcecode, and save time on future edits.
Autz64

How-To: Sine Text Scroller

Learn to be a 90s demoscene developer!
snail_

Diamond Square Noise and Plasma Effect

Noise generation and an application
haloopdy

How to record sounds from the 3DS MIC

Learn how to use the MIC to record a sound and play it!
TheV360

Showing sprite hitboxes

An easy method to draw sprite hitboxes.
Perska

Enemy Movement Done Right

Enemy movement with trig
Guzzler

CHR$(?) Codes

Show CHR$(Number)
S_DE_Solutions

Program minification

This is a long resource for program syntax compression
DevinF06

How to import audio from a computer to SmileBASIC, using Petit Modem

Easy & legal way to transfer any audio file to your Nintendo 3DS.
Sam

Map and the DATA Instruction

Maps created with the DATA instruction
rando

Make maps with DATA!

Learn how to draw maps with DATA!
the_squat1115

SmileBASIC Emulation Tips and Tricks!

Using some questionably legal thing called Citra? Here's three tips and tricks to-ran out of space.
TheV360

Magnitude Tutorial

Learn how to find out the distance between two points!
chemicalex