The battle between chara and sans continues ... However, chara can't hunt down sans and is driven into anger. So chara is forced to make a decision for a reversal.

part1→   • 【undertale】sans戦　うごメモver　「序章」  

part2→   • 【undertale】sans戦　うごメモver「本当の戦い決断」  
※ These are not translated, so they are still in Japanese.

SE I borrowed it from 効果音ラボ and Onjin and ニコニコモンズ and フリー効果音・無料効果音素材.

BGM It's Raining Somewhere Else→   • Undertale OST: 063  It's Raining Som...  
　　　Megalovania→   • Undertale OST: 100  Megalovania  
　　　Megalo Strike Back→   • Megalo Strike Back (Chara fight theme)  
　　　"Phase 2" (Megalo Strike Back)→   • Undertale: "Phase 2" (Megalo Strike B...  


my twitter→  / nocochip_main  

English translator→  / krispyfff