<p>We study the quasinormal spectrum of massless scalar fields propagating on a family of regular BTZ black holes arising from an infinite tower of dimensionally regularized Lovelock corrections. These geometries are asymptotically AdS, reduce to the standard BTZ solution in the limit <i>ℓ</i> → 0, and resolve the central singularity by introducing a smooth core controlled by the new length scale <i>ℓ</i>. The scalar quasinormal modes are computed using both Leaver’s continued-fraction method and the Horowitz-Hubeny power-series method; the two approaches agree to high accuracy across the parameter space. We find that the regularization preserves linear stability (<i>ω</i>_<i>I</i> <i>&lt;</i> 0) while qualitatively reshaping the spectrum: as <i>ℓ</i> increases, BTZ-like complex branches collide with the imaginary axis and undergo a hierarchy of bifurcations into multiple purely imaginary branches, leading to mode switching and a nontrivial reordering of overtones as functions of <i>ℓ</i> and the harmonic index <i>m</i>. Our results place regular BTZ black holes within the emerging family of bifurcating quasinormal spectra known from nearly extremal and asymptotically AdS black holes, and highlight these (2 + 1)-dimensional geometries as a controlled arena for exploring geometric mechanisms behind spectral branching and late-time ringdown in regular black hole spacetimes.</p>