In fire emblem shadow dragon how do you get to level 24x with falchion and tiki?

In "Fire Emblem: Shadow Dragon," to access Chapter 24x, you need to meet specific conditions in Chapter 24. First, you must have Marth with the Falchion and ensure Tiki is alive after the battle. Additionally, you need to complete Chapter 24 within a certain number of turns (usually under 20). If all conditions are met, the game will unlock Chapter 24x, allowing you to recruit Tiki and obtain the powerful weapon, Falchion.