Pi'illo is a base project for custom code in the EU v1.1 version of Mario & Luigi: Dream Team (Bros.)
Currently, the example will log the coin count (with svcOutputDebugString) when coins are added.
Instructions for using Magikoopa can be found in the README.md.
This project has added functionality for resolving symbol addresses, just put your symbol and it's address in syms.ld.
Use Magikoopa to build the project.